diff --git a/samples/lambdacalc/languages/samples.lambdacalc/models/editor.mps b/samples/lambdacalc/languages/samples.lambdacalc/models/editor.mps
index ae8b6274..83c13323 100644
--- a/samples/lambdacalc/languages/samples.lambdacalc/models/editor.mps
+++ b/samples/lambdacalc/languages/samples.lambdacalc/models/editor.mps
@@ -67,6 +67,8 @@
       <concept id="1630016958697344083" name="jetbrains.mps.lang.editor.structure.IMenu_Concept" flags="ng" index="2ZABuq">
         <reference id="6591946374543067572" name="conceptDeclaration" index="aqKnT" />
       </concept>
+      <concept id="1233758997495" name="jetbrains.mps.lang.editor.structure.PunctuationLeftStyleClassItem" flags="ln" index="11L4FC" />
+      <concept id="1233759184865" name="jetbrains.mps.lang.editor.structure.PunctuationRightStyleClassItem" flags="ln" index="11LMrY" />
       <concept id="8998492695583125082" name="jetbrains.mps.lang.editor.structure.SubstituteFeature_MatchingText" flags="ng" index="16NfWO">
         <child id="8998492695583129244" name="query" index="16NeZM" />
       </concept>
@@ -177,9 +179,6 @@
       <concept id="1068580123136" name="jetbrains.mps.baseLanguage.structure.StatementList" flags="sn" stub="5293379017992965193" index="3clFbS">
         <child id="1068581517665" name="statement" index="3cqZAp" />
       </concept>
-      <concept id="1068581242878" name="jetbrains.mps.baseLanguage.structure.ReturnStatement" flags="nn" index="3cpWs6">
-        <child id="1068581517676" name="expression" index="3cqZAk" />
-      </concept>
       <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
         <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
       </concept>
@@ -295,6 +294,13 @@
         <node concept="3mYdg7" id="492bFERnOR6" role="3F10Kt">
           <property role="1413C4" value="abs" />
         </node>
+        <node concept="1X3_iC" id="1IKbs5Xpc7S" role="lGtFl">
+          <property role="3V$3am" value="styleItem" />
+          <property role="3V$3ak" value="18bc6592-03a6-4e29-a83a-7ff23bde13ba/1219418625346/1219418656006" />
+          <node concept="11LMrY" id="1IKbs5XoJv9" role="8Wnug">
+            <property role="VOm3f" value="true" />
+          </node>
+        </node>
       </node>
       <node concept="3F1sOY" id="7_8aRkgF1Cc" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:7_8aRkgDGQg" resolve="binding" />
@@ -310,6 +316,13 @@
         <node concept="3mYdg7" id="492bFERnOVm" role="3F10Kt">
           <property role="1413C4" value="abs" />
         </node>
+        <node concept="1X3_iC" id="1IKbs5Xpc7X" role="lGtFl">
+          <property role="3V$3am" value="styleItem" />
+          <property role="3V$3ak" value="18bc6592-03a6-4e29-a83a-7ff23bde13ba/1219418625346/1219418656006" />
+          <node concept="11L4FC" id="1IKbs5XoJvg" role="8Wnug">
+            <property role="VOm3f" value="true" />
+          </node>
+        </node>
       </node>
       <node concept="l2Vlx" id="7_8aRkgE07O" role="2iSdaV" />
     </node>
@@ -320,6 +333,9 @@
     <node concept="3EZMnI" id="7_8aRkgE08q" role="2wV5jI">
       <node concept="3F0ifn" id="492bFERnr4S" role="3EZMnx">
         <property role="3F0ifm" value="\" />
+        <node concept="11LMrY" id="1IKbs5Xobo_" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="7_8aRkgE08x" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:7_8aRkgDGQj" resolve="var" />
@@ -358,6 +374,12 @@
       </node>
       <node concept="3F0ifn" id="4ZByBOoFhg_" role="3EZMnx">
         <property role="3F0ifm" value=" " />
+        <node concept="11L4FC" id="1IKbs5Xoxaq" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5Xoxav" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="7_8aRkgE096" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:7_8aRkgDGPX" resolve="arg" />
@@ -401,6 +423,7 @@
     <property role="3GE5qa" value="expr" />
     <ref role="aqKnT" to="8tt8:7_8aRkgDGPJ" resolve="Expr" />
     <node concept="2VfDsV" id="3TFdEPZePt6" role="3ft7WO" />
+    <node concept="3VyMlK" id="1IKbs5Xe$t0" role="3ft7WO" />
     <node concept="3eGOop" id="3TFdEPZevr9" role="3ft7WO">
       <ref role="3EoQqy" to="8tt8:7_8aRkgDGQf" resolve="Lam" />
       <node concept="ucgPf" id="3TFdEPZevra" role="3aKz83">
@@ -459,43 +482,57 @@
         </node>
       </node>
     </node>
-    <node concept="3VyMlK" id="PORTCHQeG3" role="3ft7WO" />
-    <node concept="3eGOop" id="PORTCHQepX" role="3ft7WO">
-      <ref role="3EoQqy" to="8tt8:JqEP$8fvoa" resolve="Annotated" />
-      <node concept="ucgPf" id="PORTCHQepY" role="3aKz83">
-        <node concept="3clFbS" id="PORTCHQepZ" role="2VODD2">
-          <node concept="3cpWs6" id="PORTCHRWbk" role="3cqZAp">
-            <node concept="2ShNRf" id="PORTCHRWj8" role="3cqZAk">
-              <node concept="3zrR0B" id="PORTCHRW_j" role="2ShVmc">
-                <node concept="3Tqbb2" id="PORTCHRW_l" role="3zrR0E">
+    <node concept="3VyMlK" id="1IKbs5X9ofz" role="3ft7WO" />
+    <node concept="3eGOop" id="1IKbs5X9o79" role="3ft7WO">
+      <ref role="3EoQqy" to="8tt8:JqEP$8fvqm" resolve="AnnExpr" />
+      <node concept="ucgPf" id="1IKbs5X9o7b" role="3aKz83">
+        <node concept="3clFbS" id="1IKbs5X9o7d" role="2VODD2">
+          <node concept="3clFbF" id="1IKbs5X9oG6" role="3cqZAp">
+            <node concept="2ShNRf" id="1IKbs5X9oG4" role="3clFbG">
+              <node concept="3zrR0B" id="1IKbs5X9oUr" role="2ShVmc">
+                <node concept="3Tqbb2" id="1IKbs5X9oUt" role="3zrR0E">
                   <ref role="ehGHo" to="8tt8:JqEP$8fvqm" resolve="AnnExpr" />
                 </node>
               </node>
             </node>
           </node>
-          <node concept="1X3_iC" id="PORTCHSIdo" role="lGtFl">
-            <property role="3V$3am" value="statement" />
-            <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
-            <node concept="3cpWs6" id="PORTCHRUm_" role="8Wnug">
-              <node concept="2ShNRf" id="PORTCHRRsI" role="3cqZAk">
-                <node concept="3zrR0B" id="PORTCHRSGH" role="2ShVmc">
-                  <node concept="3Tqbb2" id="PORTCHRSGJ" role="3zrR0E">
-                    <ref role="ehGHo" to="8tt8:JqEP$8fvrm" resolve="AnnVar" />
-                  </node>
+        </node>
+      </node>
+      <node concept="16NL0t" id="1IKbs5X9owg" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5X9o$9" role="16NL0q">
+          <property role="2h4Kg1" value="annotation" />
+        </node>
+      </node>
+      <node concept="16NfWO" id="1IKbs5X9oC5" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5X9oG1" role="16NeZM">
+          <property role="2h4Kg1" value="::" />
+        </node>
+      </node>
+    </node>
+    <node concept="3VyMlK" id="1IKbs5X9onT" role="3ft7WO" />
+    <node concept="3eGOop" id="1IKbs5X9n8j" role="3ft7WO">
+      <ref role="3EoQqy" to="8tt8:JqEP$8sgV5" resolve="Pair" />
+      <node concept="ucgPf" id="1IKbs5X9n8l" role="3aKz83">
+        <node concept="3clFbS" id="1IKbs5X9n8n" role="2VODD2">
+          <node concept="3clFbF" id="1IKbs5X9nhp" role="3cqZAp">
+            <node concept="2ShNRf" id="1IKbs5X9nhn" role="3clFbG">
+              <node concept="3zrR0B" id="1IKbs5X9nvY" role="2ShVmc">
+                <node concept="3Tqbb2" id="1IKbs5X9nw0" role="3zrR0E">
+                  <ref role="ehGHo" to="8tt8:JqEP$8sgV5" resolve="Pair" />
                 </node>
               </node>
             </node>
           </node>
         </node>
       </node>
-      <node concept="16NL0t" id="PORTCHQeqg" role="upBLP">
-        <node concept="2h3Zct" id="PORTCHQeqh" role="16NL0q">
-          <property role="2h4Kg1" value="annotation" />
+      <node concept="16NL0t" id="1IKbs5X9nGn" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5X9nTn" role="16NL0q">
+          <property role="2h4Kg1" value="pair" />
         </node>
       </node>
-      <node concept="16NfWO" id="PORTCHQeqi" role="upBLP">
-        <node concept="2h3Zct" id="PORTCHQeqj" role="16NeZM">
-          <property role="2h4Kg1" value="::" />
+      <node concept="16NfWO" id="1IKbs5X9nXK" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5X9o29" role="16NeZM">
+          <property role="2h4Kg1" value="( " />
         </node>
       </node>
     </node>
@@ -852,6 +889,12 @@
             </node>
           </node>
         </node>
+        <node concept="3mYdg7" id="1IKbs5XpCez" role="3F10Kt">
+          <property role="1413C4" value="forallType" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5XpDch" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F0ifn" id="12dHl3ZCFaC" role="3EZMnx">
         <property role="3F0ifm" value="forall" />
@@ -863,6 +906,9 @@
       </node>
       <node concept="3F0ifn" id="48ZGLP7q1QP" role="3EZMnx">
         <property role="3F0ifm" value="." />
+        <node concept="11L4FC" id="1IKbs5XoXAX" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="12dHl3ZCFaK" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:12dHl3ZCFaI" resolve="type" />
@@ -886,6 +932,12 @@
             </node>
           </node>
         </node>
+        <node concept="3mYdg7" id="1IKbs5XpCqU" role="3F10Kt">
+          <property role="1413C4" value="forallType" />
+        </node>
+        <node concept="11L4FC" id="1IKbs5XpCNz" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
     </node>
   </node>
@@ -930,18 +982,33 @@
     <node concept="3EZMnI" id="JqEP$8sgVl" role="2wV5jI">
       <node concept="3F0ifn" id="JqEP$8sgVC" role="3EZMnx">
         <property role="3F0ifm" value="(" />
+        <node concept="3mYdg7" id="1IKbs5XpwYT" role="3F10Kt">
+          <property role="1413C4" value="pair" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5XmIX2" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8sgWK" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8sgV6" resolve="fst" />
       </node>
       <node concept="3F0ifn" id="JqEP$8sgWv" role="3EZMnx">
         <property role="3F0ifm" value="," />
+        <node concept="11L4FC" id="1IKbs5XopKW" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8sgVO" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8sgV8" resolve="snd" />
       </node>
       <node concept="3F0ifn" id="JqEP$8sgVI" role="3EZMnx">
         <property role="3F0ifm" value=")" />
+        <node concept="3mYdg7" id="1IKbs5XpwZ0" role="3F10Kt">
+          <property role="1413C4" value="pair" />
+        </node>
+        <node concept="11L4FC" id="1IKbs5XmIX5" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="l2Vlx" id="JqEP$8sgVo" role="2iSdaV" />
     </node>
@@ -952,6 +1019,12 @@
     <node concept="3EZMnI" id="JqEP$8fvqt" role="2wV5jI">
       <node concept="3F0ifn" id="JqEP$8fvqB" role="3EZMnx">
         <property role="3F0ifm" value="(" />
+        <node concept="3mYdg7" id="1IKbs5Xpq15" role="3F10Kt">
+          <property role="1413C4" value="annExp" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5Xpj3Y" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8fvr6" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8fvqp" resolve="expr" />
@@ -964,6 +1037,12 @@
       </node>
       <node concept="3F0ifn" id="JqEP$8fvqJ" role="3EZMnx">
         <property role="3F0ifm" value=")" />
+        <node concept="3mYdg7" id="1IKbs5Xpq1c" role="3F10Kt">
+          <property role="1413C4" value="annExp" />
+        </node>
+        <node concept="11L4FC" id="1IKbs5Xpj40" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="l2Vlx" id="JqEP$8fvqw" role="2iSdaV" />
     </node>
@@ -974,6 +1053,12 @@
     <node concept="3EZMnI" id="JqEP$8fvrt" role="2wV5jI">
       <node concept="3F0ifn" id="JqEP$8fvrK" role="3EZMnx">
         <property role="3F0ifm" value="(" />
+        <node concept="3mYdg7" id="1IKbs5Xpq1j" role="3F10Kt">
+          <property role="1413C4" value="annVar" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5Xpj3U" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8gHP4" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8fvrp" resolve="var" />
@@ -986,6 +1071,12 @@
       </node>
       <node concept="3F0ifn" id="JqEP$8fvrQ" role="3EZMnx">
         <property role="3F0ifm" value=")" />
+        <node concept="3mYdg7" id="1IKbs5Xpq1q" role="3F10Kt">
+          <property role="1413C4" value="annVar" />
+        </node>
+        <node concept="11L4FC" id="1IKbs5Xpj3W" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="l2Vlx" id="JqEP$8fvrw" role="2iSdaV" />
     </node>
@@ -996,18 +1087,33 @@
     <node concept="3EZMnI" id="JqEP$8shbr" role="2wV5jI">
       <node concept="3F0ifn" id="JqEP$8shbs" role="3EZMnx">
         <property role="3F0ifm" value="(" />
+        <node concept="3mYdg7" id="1IKbs5XpwZ7" role="3F10Kt">
+          <property role="1413C4" value="pairType" />
+        </node>
+        <node concept="11LMrY" id="1IKbs5Xp5bK" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8shbt" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8shbd" resolve="fstType" />
       </node>
       <node concept="3F0ifn" id="JqEP$8shbu" role="3EZMnx">
         <property role="3F0ifm" value="," />
+        <node concept="11L4FC" id="1IKbs5Xp5bO" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="3F1sOY" id="JqEP$8shbv" role="3EZMnx">
         <ref role="1NtTu8" to="8tt8:JqEP$8shbb" resolve="sndType" />
       </node>
       <node concept="3F0ifn" id="JqEP$8shbw" role="3EZMnx">
         <property role="3F0ifm" value=")" />
+        <node concept="3mYdg7" id="1IKbs5XpwZe" role="3F10Kt">
+          <property role="1413C4" value="pairType" />
+        </node>
+        <node concept="11L4FC" id="1IKbs5Xp5bM" role="3F10Kt">
+          <property role="VOm3f" value="true" />
+        </node>
       </node>
       <node concept="l2Vlx" id="JqEP$8shbx" role="2iSdaV" />
     </node>
@@ -1028,5 +1134,96 @@
       <node concept="l2Vlx" id="48ZGLP8$3cC" role="2iSdaV" />
     </node>
   </node>
+  <node concept="3p36aQ" id="1IKbs5Xa80E">
+    <property role="3GE5qa" value="type" />
+    <ref role="aqKnT" to="8tt8:3_qfG1EP6Nw" resolve="Type" />
+    <node concept="2VfDsV" id="1IKbs5XdOMi" role="3ft7WO" />
+    <node concept="3VyMlK" id="1IKbs5Xe$oh" role="3ft7WO" />
+    <node concept="3eGOop" id="1IKbs5Xa80L" role="3ft7WO">
+      <ref role="3EoQqy" to="8tt8:3_qfG1EP6Of" resolve="FunType" />
+      <node concept="16NL0t" id="1IKbs5Xa8bO" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5Xa8bP" role="16NL0q">
+          <property role="2h4Kg1" value="fun type" />
+        </node>
+      </node>
+      <node concept="16NfWO" id="1IKbs5Xa8bQ" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5Xa8bR" role="16NeZM">
+          <property role="2h4Kg1" value="-&gt;" />
+        </node>
+      </node>
+      <node concept="ucgPf" id="1IKbs5Xa80N" role="3aKz83">
+        <node concept="3clFbS" id="1IKbs5Xa80P" role="2VODD2">
+          <node concept="3clFbF" id="1IKbs5Xa8hB" role="3cqZAp">
+            <node concept="2ShNRf" id="1IKbs5Xa8h_" role="3clFbG">
+              <node concept="3zrR0B" id="1IKbs5Xa8xU" role="2ShVmc">
+                <node concept="3Tqbb2" id="1IKbs5Xa8xW" role="3zrR0E">
+                  <ref role="ehGHo" to="8tt8:3_qfG1EP6Of" resolve="FunType" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="3VyMlK" id="1IKbs5Xa8WT" role="3ft7WO" />
+    <node concept="1X3_iC" id="1IKbs5XjMNP" role="lGtFl">
+      <property role="3V$3am" value="parts" />
+      <property role="3V$3ak" value="18bc6592-03a6-4e29-a83a-7ff23bde13ba/2000375450116454183/414384289274416996" />
+      <node concept="3eGOop" id="1IKbs5Xa8PK" role="8Wnug">
+        <ref role="3EoQqy" to="8tt8:12dHl3ZCxTW" resolve="ForallType" />
+        <node concept="16NL0t" id="1IKbs5Xa8PL" role="upBLP">
+          <node concept="2h3Zct" id="1IKbs5Xa8PM" role="16NL0q">
+            <property role="2h4Kg1" value="forall type" />
+          </node>
+        </node>
+        <node concept="16NfWO" id="1IKbs5Xa8PN" role="upBLP">
+          <node concept="2h3Zct" id="1IKbs5Xa8PO" role="16NeZM">
+            <property role="2h4Kg1" value="forall" />
+          </node>
+        </node>
+        <node concept="ucgPf" id="1IKbs5Xa8PP" role="3aKz83">
+          <node concept="3clFbS" id="1IKbs5Xa8PQ" role="2VODD2">
+            <node concept="3clFbF" id="1IKbs5Xa8PR" role="3cqZAp">
+              <node concept="2ShNRf" id="1IKbs5Xa8PS" role="3clFbG">
+                <node concept="3zrR0B" id="1IKbs5Xa8PT" role="2ShVmc">
+                  <node concept="3Tqbb2" id="1IKbs5Xa8PU" role="3zrR0E">
+                    <ref role="ehGHo" to="8tt8:12dHl3ZCxTW" resolve="ForallType" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="3VyMlK" id="1IKbs5Xa8JG" role="3ft7WO" />
+    <node concept="3eGOop" id="1IKbs5Xa9fQ" role="3ft7WO">
+      <ref role="3EoQqy" to="8tt8:JqEP$8shba" resolve="PairType" />
+      <node concept="16NL0t" id="1IKbs5Xa9fR" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5Xa9fS" role="16NL0q">
+          <property role="2h4Kg1" value="pair type" />
+        </node>
+      </node>
+      <node concept="16NfWO" id="1IKbs5Xa9fT" role="upBLP">
+        <node concept="2h3Zct" id="1IKbs5Xa9fU" role="16NeZM">
+          <property role="2h4Kg1" value="(" />
+        </node>
+      </node>
+      <node concept="ucgPf" id="1IKbs5Xa9fV" role="3aKz83">
+        <node concept="3clFbS" id="1IKbs5Xa9fW" role="2VODD2">
+          <node concept="3clFbF" id="1IKbs5Xa9fX" role="3cqZAp">
+            <node concept="2ShNRf" id="1IKbs5Xa9fY" role="3clFbG">
+              <node concept="3zrR0B" id="1IKbs5Xa9fZ" role="2ShVmc">
+                <node concept="3Tqbb2" id="1IKbs5Xa9g0" role="3zrR0E">
+                  <ref role="ehGHo" to="8tt8:JqEP$8shba" resolve="PairType" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="3VyMlK" id="1IKbs5Xa9fm" role="3ft7WO" />
+  </node>
 </model>
 
diff --git a/samples/lambdacalc/languages/samples.lambdacalc/models/structure.mps b/samples/lambdacalc/languages/samples.lambdacalc/models/structure.mps
index 05d04473..c44184eb 100644
--- a/samples/lambdacalc/languages/samples.lambdacalc/models/structure.mps
+++ b/samples/lambdacalc/languages/samples.lambdacalc/models/structure.mps
@@ -361,21 +361,6 @@
       <ref role="20lvS9" node="7_8aRkgDGPJ" resolve="Expr" />
     </node>
   </node>
-  <node concept="PlHQZ" id="JqEP$8fvoa">
-    <property role="EcuMT" value="854183478218847754" />
-    <property role="3GE5qa" value="expr" />
-    <property role="TrG5h" value="Annotated" />
-    <node concept="PrWs8" id="JqEP$8fvob" role="PrDN$">
-      <ref role="PrY4T" node="3TFdEPZf9SZ" resolve="Typeable" />
-    </node>
-    <node concept="1TJgyj" id="JqEP$8fvrd" role="1TKVEi">
-      <property role="IQ2ns" value="854183478218847949" />
-      <property role="20lmBu" value="aggregation" />
-      <property role="20kJfa" value="ann" />
-      <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3_qfG1EP6Nw" resolve="Type" />
-    </node>
-  </node>
   <node concept="1TIwiD" id="JqEP$8fvqm">
     <property role="EcuMT" value="854183478218847894" />
     <property role="3GE5qa" value="expr" />
@@ -410,6 +395,34 @@
       <ref role="20lvS9" node="7_8aRkgDGPo" resolve="Var" />
     </node>
   </node>
+  <node concept="PlHQZ" id="JqEP$8fvoa">
+    <property role="EcuMT" value="854183478218847754" />
+    <property role="3GE5qa" value="expr" />
+    <property role="TrG5h" value="Annotated" />
+    <node concept="PrWs8" id="JqEP$8fvob" role="PrDN$">
+      <ref role="PrY4T" node="3TFdEPZf9SZ" resolve="Typeable" />
+    </node>
+    <node concept="1TJgyj" id="JqEP$8fvrd" role="1TKVEi">
+      <property role="IQ2ns" value="854183478218847949" />
+      <property role="20lmBu" value="aggregation" />
+      <property role="20kJfa" value="ann" />
+      <property role="20lbJX" value="1" />
+      <ref role="20lvS9" node="3_qfG1EP6Nw" resolve="Type" />
+    </node>
+  </node>
+  <node concept="1TIwiD" id="48ZGLP8$3c6">
+    <property role="EcuMT" value="4773731068388848390" />
+    <property role="3GE5qa" value="type" />
+    <property role="TrG5h" value="VarTypeRef" />
+    <ref role="1TJDcQ" node="3_qfG1EP6Nw" resolve="Type" />
+    <node concept="1TJgyj" id="48ZGLP8$3cj" role="1TKVEi">
+      <property role="IQ2ns" value="4773731068388848403" />
+      <property role="20lmBu" value="reference" />
+      <property role="20kJfa" value="def" />
+      <property role="20lbJX" value="1" />
+      <ref role="20lvS9" node="3g9UT2j9I06" resolve="VarType" />
+    </node>
+  </node>
   <node concept="1TIwiD" id="JqEP$8sgV5">
     <property role="EcuMT" value="854183478222196421" />
     <property role="3GE5qa" value="expr" />
@@ -451,18 +464,5 @@
       <ref role="20lvS9" node="3_qfG1EP6Nw" resolve="Type" />
     </node>
   </node>
-  <node concept="1TIwiD" id="48ZGLP8$3c6">
-    <property role="EcuMT" value="4773731068388848390" />
-    <property role="3GE5qa" value="type" />
-    <property role="TrG5h" value="VarTypeRef" />
-    <ref role="1TJDcQ" node="3_qfG1EP6Nw" resolve="Type" />
-    <node concept="1TJgyj" id="48ZGLP8$3cj" role="1TKVEi">
-      <property role="IQ2ns" value="4773731068388848403" />
-      <property role="20lmBu" value="reference" />
-      <property role="20kJfa" value="def" />
-      <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3g9UT2j9I06" resolve="VarType" />
-    </node>
-  </node>
 </model>
 
diff --git a/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps b/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
index e4b944ab..e1f54633 100644
--- a/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
+++ b/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
@@ -845,6 +845,33 @@
         <property role="TrG5h" value="type" />
       </node>
     </node>
+    <node concept="3AqmO8" id="48ZGLP7ph5I" role="8PkJo">
+      <property role="TrG5h" value="newTypeVars" />
+      <node concept="1zAUYm" id="48ZGLP7pibx" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7phpp" role="1zAUyy">
+        <property role="TrG5h" value="introducedTypeVars" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="JqEP$8kz$w" role="8PkJo">
+      <property role="TrG5h" value="varTypeName" />
+      <node concept="1zAUYm" id="JqEP$8kzCM" role="1zAUyy">
+        <property role="TrG5h" value="varType" />
+      </node>
+      <node concept="1zAUYm" id="JqEP$8kzCK" role="1zAUyy">
+        <property role="TrG5h" value="name" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="JqEP$8pb_j" role="8PkJo">
+      <property role="TrG5h" value="varTypeNameConflict" />
+      <node concept="1zAUYm" id="JqEP$8pbI8" role="1zAUyy">
+        <property role="TrG5h" value="varType" />
+      </node>
+      <node concept="1zAUYm" id="JqEP$8pbIa" role="1zAUyy">
+        <property role="TrG5h" value="conflictName" />
+      </node>
+    </node>
     <node concept="1nLNMY" id="6EwjVjWrA7F" role="1nK1Vg">
       <property role="TrG5h" value="typeOf_unique" />
       <node concept="3clFbS" id="6EwjVjWrA7G" role="1nLNMH">
@@ -1780,16 +1807,54 @@
                 </node>
               </node>
             </node>
-            <node concept="3Aq9E8" id="3dV5CmlM9l_" role="1nLNMd">
-              <node concept="3I6sU6" id="Cn$NxdZfmi" role="3Ip0Jz">
-                <node concept="3I6s7M" id="Cn$NxdZfmj" role="3I6sU7">
-                  <node concept="B_ONY" id="5zncGqweDlP" role="3I6s78">
-                    <ref role="17QRF" node="3_qfG1EPlgE" resolve="Fun" />
-                    <node concept="a7P8L" id="5zncGqweDmp" role="B_OMz">
-                      <ref role="a7OzE" node="3dV5CmlM9lE" resolve="T" />
+            <node concept="3Aq93q" id="48ZGLP7pqNs" role="1nLNMb">
+              <property role="3ArMco" value="true" />
+              <node concept="3I6sU6" id="48ZGLP7pqNt" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP7pqNN" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP7pqNM" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
+                    <node concept="3BlFb$" id="48ZGLP7ww6n" role="3AunhB">
+                      <node concept="2OqwBi" id="48ZGLP7wxvk" role="3BlFb_">
+                        <node concept="2OqwBi" id="48ZGLP7wwf5" role="2Oq$k0">
+                          <node concept="3A2sRY" id="48ZGLP7ww6E" role="2Oq$k0">
+                            <ref role="3A2yKK" node="3dV5CmlM9jX" resolve="lam" />
+                          </node>
+                          <node concept="3TrEf2" id="48ZGLP7wwVQ" role="2OqNvi">
+                            <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQg" resolve="binding" />
+                          </node>
+                        </node>
+                        <node concept="3TrEf2" id="48ZGLP7wy3l" role="2OqNvi">
+                          <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQj" resolve="var" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="a7P8L" id="48ZGLP7pqOT" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP7pqO4" resolve="TVsA" />
                     </node>
                   </node>
                 </node>
+                <node concept="3I6s7M" id="48ZGLP7pqPi" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP7pqPg" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
+                    <node concept="3BlFb$" id="48ZGLP7wy7O" role="3AunhB">
+                      <node concept="2OqwBi" id="48ZGLP7wygy" role="3BlFb_">
+                        <node concept="3A2sRY" id="48ZGLP7wy87" role="2Oq$k0">
+                          <ref role="3A2yKK" node="3dV5CmlM9jX" resolve="lam" />
+                        </node>
+                        <node concept="3TrEf2" id="48ZGLP7wyJs" role="2OqNvi">
+                          <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQl" resolve="expr" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="a7P8L" id="48ZGLP7pqPL" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP7pqOl" resolve="TVsR" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9E8" id="3dV5CmlM9l_" role="1nLNMd">
+              <node concept="3I6sU6" id="Cn$NxdZfmi" role="3Ip0Jz">
                 <node concept="3I6s7M" id="Cn$NxdZfmk" role="3I6sU7">
                   <node concept="3A8Hvi" id="3dV5CmlM9lN" role="3I6s78">
                     <node concept="a7P8L" id="3dV5CmlM9lV" role="3A8wtg">
@@ -1858,52 +1923,6 @@
                 </node>
               </node>
             </node>
-            <node concept="3Aq93q" id="48ZGLP7pqNs" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="48ZGLP7pqNt" role="3Ip0Jz">
-                <node concept="3I6s7M" id="48ZGLP7pqNN" role="3I6sU7">
-                  <node concept="3Aqt3T" id="48ZGLP7pqNM" role="3I6s78">
-                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
-                    <node concept="3BlFb$" id="48ZGLP7ww6n" role="3AunhB">
-                      <node concept="2OqwBi" id="48ZGLP7wxvk" role="3BlFb_">
-                        <node concept="2OqwBi" id="48ZGLP7wwf5" role="2Oq$k0">
-                          <node concept="3A2sRY" id="48ZGLP7ww6E" role="2Oq$k0">
-                            <ref role="3A2yKK" node="3dV5CmlM9jX" resolve="lam" />
-                          </node>
-                          <node concept="3TrEf2" id="48ZGLP7wwVQ" role="2OqNvi">
-                            <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQg" resolve="binding" />
-                          </node>
-                        </node>
-                        <node concept="3TrEf2" id="48ZGLP7wy3l" role="2OqNvi">
-                          <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQj" resolve="var" />
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="a7P8L" id="48ZGLP7pqOT" role="3AunhB">
-                      <ref role="a7OzE" node="48ZGLP7pqO4" resolve="TVsA" />
-                    </node>
-                  </node>
-                </node>
-                <node concept="3I6s7M" id="48ZGLP7pqPi" role="3I6sU7">
-                  <node concept="3Aqt3T" id="48ZGLP7pqPg" role="3I6s78">
-                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
-                    <node concept="3BlFb$" id="48ZGLP7wy7O" role="3AunhB">
-                      <node concept="2OqwBi" id="48ZGLP7wygy" role="3BlFb_">
-                        <node concept="3A2sRY" id="48ZGLP7wy87" role="2Oq$k0">
-                          <ref role="3A2yKK" node="3dV5CmlM9jX" resolve="lam" />
-                        </node>
-                        <node concept="3TrEf2" id="48ZGLP7wyJs" role="2OqNvi">
-                          <ref role="3Tt5mk" to="8tt8:7_8aRkgDGQl" resolve="expr" />
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="a7P8L" id="48ZGLP7pqPL" role="3AunhB">
-                      <ref role="a7OzE" node="48ZGLP7pqOl" resolve="TVsR" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
           </node>
         </node>
       </node>
@@ -1914,259 +1933,371 @@
         </node>
       </node>
     </node>
-    <node concept="1nLNMY" id="PORTCHXHbT" role="1nK1Vg">
+    <node concept="1nLNMY" id="6$MtiK8IMVN" role="1nK1Vg">
       <property role="TrG5h" value="typeoOf_App" />
-      <node concept="3clFbS" id="PORTCHXHbU" role="1nLNMH">
-        <node concept="1nLNNL" id="PORTCHXHbV" role="3cqZAp">
-          <node concept="1nLNMm" id="PORTCHXHbW" role="1nLNNK">
-            <node concept="0eUR_" id="PORTCHXHbX" role="0UC6o">
-              <node concept="3NuqgR" id="PORTCHXHbY" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHbZ" role="3XD1gS">
+      <node concept="3clFbS" id="6$MtiK8IMVO" role="1nLNMH">
+        <node concept="1nLNNL" id="6$MtiK8IMVP" role="3cqZAp">
+          <node concept="1nLNMm" id="6$MtiK8IMVQ" role="1nLNNK">
+            <node concept="0eUR_" id="6K6UrSyHVK4" role="0UC6o">
+              <node concept="3NuqgR" id="44a9n8ErWrx" role="0eVf_">
+                <node concept="aZer4" id="44a9n8ErWry" role="3XD1gS">
                   <property role="TrG5h" value="F" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHc0" role="3XD1gS">
+                <node concept="aZer4" id="44a9n8ErWrT" role="3XD1gS">
                   <property role="TrG5h" value="A" />
                 </node>
               </node>
-              <node concept="3NuqgR" id="PORTCHXHc1" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHc2" role="3XD1gS">
+              <node concept="3NuqgR" id="44a9n8Es2A6" role="0eVf_">
+                <node concept="aZer4" id="44a9n8Es2A7" role="3XD1gS">
                   <property role="TrG5h" value="FA" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHc3" role="3XD1gS">
+                <node concept="aZer4" id="44a9n8Es2Aj" role="3XD1gS">
                   <property role="TrG5h" value="FR" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHc4" role="3XD1gS">
+                <node concept="aZer4" id="3Lj6UsgFxni" role="3XD1gS">
                   <property role="TrG5h" value="FI" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHc5" role="3XD1gS">
+                <node concept="aZer4" id="3Lj6UsgFFuW" role="3XD1gS">
                   <property role="TrG5h" value="AI" />
                 </node>
               </node>
-              <node concept="3NuqgR" id="PORTCHXHc6" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHc7" role="3XD1gS">
+              <node concept="3NuqgR" id="WBEjvSTpvn" role="0eVf_">
+                <node concept="aZer4" id="WBEjvSTpvo" role="3XD1gS">
                   <property role="TrG5h" value="E" />
                 </node>
-                <node concept="17QB3L" id="PORTCHXHc8" role="3vLBG7" />
+                <node concept="17QB3L" id="WBEjvSTpvE" role="3vLBG7" />
               </node>
-              <node concept="3NuqgR" id="PORTCHXHc9" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHca" role="3XD1gS">
+              <node concept="3NuqgR" id="48ZGLP7pqX6" role="0eVf_">
+                <node concept="aZer4" id="48ZGLP7pqXQ" role="3XD1gS">
                   <property role="TrG5h" value="TVsF" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHcb" role="3XD1gS">
+                <node concept="aZer4" id="48ZGLP7zPYF" role="3XD1gS">
                   <property role="TrG5h" value="TVsA" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHcc" role="3XD1gS">
+                <node concept="aZer4" id="48ZGLP7zPYS" role="3XD1gS">
                   <property role="TrG5h" value="TVs" />
                 </node>
               </node>
-              <node concept="3NuqgR" id="PORTCHXHcd" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHce" role="3XD1gS">
+              <node concept="3NuqgR" id="48ZGLP7zRTq" role="0eVf_">
+                <node concept="aZer4" id="48ZGLP7zRTr" role="3XD1gS">
                   <property role="TrG5h" value="ITVsF" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHcf" role="3XD1gS">
+                <node concept="aZer4" id="48ZGLP7zRTQ" role="3XD1gS">
                   <property role="TrG5h" value="ITVsA" />
                 </node>
               </node>
-              <node concept="3NuqgR" id="PORTCHXHcg" role="0eVf_">
-                <node concept="aZer4" id="PORTCHXHch" role="3XD1gS">
+              <node concept="3NuqgR" id="48ZGLP7zSrz" role="0eVf_">
+                <node concept="aZer4" id="48ZGLP7zSr$" role="3XD1gS">
                   <property role="TrG5h" value="TVs1" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHci" role="3XD1gS">
+                <node concept="aZer4" id="48ZGLP7zSrW" role="3XD1gS">
                   <property role="TrG5h" value="TVs2" />
                 </node>
-                <node concept="aZer4" id="PORTCHXHcj" role="3XD1gS">
+                <node concept="aZer4" id="48ZGLP7zSyV" role="3XD1gS">
                   <property role="TrG5h" value="TVs3" />
                 </node>
               </node>
             </node>
-            <node concept="3Aq93q" id="PORTCHXHck" role="1nLNMb">
+            <node concept="3Aq93q" id="44a9n8ErWrt" role="1nLNMb">
               <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="PORTCHXHcl" role="3Ip0Jz">
-                <node concept="3I6s7M" id="PORTCHXHcm" role="3I6sU7">
-                  <node concept="3Aqt3T" id="PORTCHXHcn" role="3I6s78">
+              <node concept="3I6sU6" id="WBEjvSTmqr" role="3Ip0Jz">
+                <node concept="3I6s7M" id="WBEjvSTmqs" role="3I6sU7">
+                  <node concept="3Aqt3T" id="4KALGUEh0c9" role="3I6s78">
                     <ref role="3AqCNq" node="4KALGUEgLbG" resolve="typeOf" />
-                    <node concept="3BlFb$" id="PORTCHXHco" role="3AunhB">
-                      <node concept="2OqwBi" id="PORTCHXHcp" role="3BlFb_">
-                        <node concept="3A2sRY" id="PORTCHXHcq" role="2Oq$k0">
-                          <ref role="3A2yKK" node="PORTCHXHeq" resolve="app" />
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+                                  <ref role="a7OzE" node="48ZGLP7zSyV" resolve="TVs3" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="3Aqczg" id="PORTCHOCeH" role="3cqZAp">
+                      <node concept="3GeI9q" id="PORTCHOCeI" role="3Aqpz8">
+                        <node concept="a7P8L" id="PORTCHOCeJ" role="3GeI8F">
+                          <ref role="a7OzE" node="48ZGLP7zPYS" resolve="TVs" />
+                        </node>
+                        <node concept="ns1u0" id="PORTCHOCeK" role="3GeI8D">
                           <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
-                          <node concept="nsMwS" id="PORTCHXHdZ" role="ns1xD">
+                          <node concept="nsMwS" id="PORTCHOCeL" role="ns1xD">
                             <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
-                            <node concept="1nq8_$" id="PORTCHXHe0" role="nsMwV">
-                              <node concept="a7P8L" id="PORTCHXHe1" role="1nq8_t">
-                                <ref role="a7OzE" node="PORTCHXHc3" resolve="FR" />
+                            <node concept="1nq8_$" id="PORTCHOCeM" role="nsMwV">
+                              <node concept="a7P8L" id="PORTCHOCeN" role="1nq8_t">
+                                <ref role="a7OzE" node="44a9n8Es2Aj" resolve="FR" />
                               </node>
                             </node>
                           </node>
-                          <node concept="nsMwS" id="PORTCHXHe2" role="ns1xD">
+                          <node concept="nsMwS" id="PORTCHOCeO" role="ns1xD">
                             <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
-                            <node concept="1nq8_$" id="PORTCHXHe3" role="nsMwV">
-                              <node concept="a7P8L" id="PORTCHXIGz" role="1nq8_t">
-                                <ref role="a7OzE" node="PORTCHXHch" resolve="TVs1" />
+                            <node concept="1nq8_$" id="PORTCHOCeP" role="nsMwV">
+                              <node concept="a7P8L" id="PORTCHOChI" role="1nq8_t">
+                                <ref role="a7OzE" node="48ZGLP7zSrW" resolve="TVs2" />
                               </node>
                             </node>
                           </node>
                         </node>
                       </node>
                     </node>
-                    <node concept="3Aqczg" id="PORTCHXHe5" role="3cqZAp">
-                      <node concept="3Aqt3T" id="PORTCHXHe6" role="3Aqpz8">
+                    <node concept="3Aqczg" id="48ZGLP8pIwO" role="3cqZAp">
+                      <node concept="3Aqt3T" id="48ZGLP7prwp" role="3Aqpz8">
                         <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
-                        <node concept="3BlFb$" id="PORTCHXHe7" role="3AunhB">
-                          <node concept="3A2sRY" id="PORTCHXHe8" role="3BlFb_">
-                            <ref role="3A2yKK" node="PORTCHXHeq" resolve="app" />
+                        <node concept="3BlFb$" id="48ZGLP7wzy6" role="3AunhB">
+                          <node concept="3A2sRY" id="48ZGLP7wzyp" role="3BlFb_">
+                            <ref role="3A2yKK" node="44a9n8ErWrh" resolve="app" />
                           </node>
                         </node>
-                        <node concept="a7P8L" id="PORTCHXHe9" role="3AunhB">
-                          <ref role="a7OzE" node="PORTCHXHcc" resolve="TVs" />
+                        <node concept="a7P8L" id="48ZGLP7zSzz" role="3AunhB">
+                          <ref role="a7OzE" node="48ZGLP7zPYS" resolve="TVs" />
                         </node>
                       </node>
                     </node>
@@ -2174,33 +2305,33 @@
                 </node>
               </node>
             </node>
-            <node concept="3Aq9E8" id="PORTCHXHea" role="1nLNMd">
-              <node concept="3I6sU6" id="PORTCHXHeb" role="3Ip0Jz">
-                <node concept="3I6s7M" id="PORTCHXHec" role="3I6sU7">
-                  <node concept="3wWvb2" id="PORTCHXHed" role="3I6s78">
-                    <node concept="2OqwBi" id="PORTCHXHee" role="3wWo3s">
-                      <node concept="3A2sRY" id="PORTCHXHef" role="2Oq$k0">
-                        <ref role="3A2yKK" node="PORTCHXHeq" resolve="app" />
+            <node concept="3Aq9E8" id="N6wx6Hp2i_" role="1nLNMd">
+              <node concept="3I6sU6" id="N6wx6Hp2j6" role="3Ip0Jz">
+                <node concept="3I6s7M" id="6K6UrSyIe0s" role="3I6sU7">
+                  <node concept="3wWvb2" id="6K6UrSyIe0r" role="3I6s78">
+                    <node concept="2OqwBi" id="6K6UrSyIerA" role="3wWo3s">
+                      <node concept="3A2sRY" id="6K6UrSyIeje" role="2Oq$k0">
+                        <ref role="3A2yKK" node="44a9n8ErWrh" resolve="app" />
                       </node>
-                      <node concept="2s7oft" id="PORTCHXHeg" role="2OqNvi">
+                      <node concept="2s7oft" id="6K6UrSyIeTu" role="2OqNvi">
                         <property role="2s7ueQ" value="error" />
-                        <node concept="2YIFZM" id="PORTCHXHeh" role="2s7u9n">
-                          <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...):java.lang.String" resolve="format" />
+                        <node concept="2YIFZM" id="6K6UrSyIfsz" role="2s7u9n">
                           <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
-                          <node concept="Xl_RD" id="PORTCHXHei" role="37wK5m">
+                          <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...):java.lang.String" resolve="format" />
+                          <node concept="Xl_RD" id="6K6UrSyIfs$" role="37wK5m">
                             <property role="Xl_RC" value="cannot unify '%s' and '%s'" />
                           </node>
-                          <node concept="1TmgYN" id="PORTCHXHej" role="37wK5m">
-                            <node concept="1nq8_$" id="PORTCHXHek" role="1Tms7$">
-                              <node concept="a7P8L" id="PORTCHXHel" role="1nq8_t">
-                                <ref role="a7OzE" node="PORTCHXHc2" resolve="FA" />
+                          <node concept="1TmgYN" id="6K6UrSyIfs_" role="37wK5m">
+                            <node concept="1nq8_$" id="6K6UrSyIfsA" role="1Tms7$">
+                              <node concept="a7P8L" id="6K6UrSyIfsB" role="1nq8_t">
+                                <ref role="a7OzE" node="44a9n8Es2A7" resolve="FA" />
                               </node>
                             </node>
                           </node>
-                          <node concept="1TmgYN" id="PORTCHXHem" role="37wK5m">
-                            <node concept="1nq8_$" id="PORTCHXHen" role="1Tms7$">
-                              <node concept="a7P8L" id="PORTCHXHeo" role="1nq8_t">
-                                <ref role="a7OzE" node="PORTCHXHc0" resolve="A" />
+                          <node concept="1TmgYN" id="6K6UrSyIfsC" role="37wK5m">
+                            <node concept="1nq8_$" id="6K6UrSyIfsD" role="1Tms7$">
+                              <node concept="a7P8L" id="6K6UrSyIfsE" role="1nq8_t">
+                                <ref role="a7OzE" node="44a9n8ErWrT" resolve="A" />
                               </node>
                             </node>
                           </node>
@@ -2214,9 +2345,9 @@
           </node>
         </node>
       </node>
-      <node concept="2t___k" id="PORTCHXHep" role="1nLNMg">
+      <node concept="2t___k" id="44a9n8ErWrg" role="1nLNMg">
         <ref role="2t_S0q" to="8tt8:7_8aRkgDGPK" resolve="App" />
-        <node concept="3A20r5" id="PORTCHXHeq" role="2t_VXX">
+        <node concept="3A20r5" id="44a9n8ErWrh" role="2t_VXX">
           <property role="TrG5h" value="app" />
         </node>
       </node>
@@ -2303,6 +2434,29 @@
                 </node>
               </node>
             </node>
+            <node concept="3Aq93q" id="48ZGLP7wzyx" role="1nLNMb">
+              <property role="3ArMco" value="true" />
+              <node concept="3I6sU6" id="48ZGLP7wzyy" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP7wzyX" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP7wzyW" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
+                    <node concept="3BlFb$" id="48ZGLP7wzz0" role="3AunhB">
+                      <node concept="2OqwBi" id="48ZGLP7wzFy" role="3BlFb_">
+                        <node concept="3A2sRY" id="48ZGLP7wzz7" role="2Oq$k0">
+                          <ref role="3A2yKK" node="6_p$mL23fzC" resolve="ite" />
+                        </node>
+                        <node concept="3TrEf2" id="48ZGLP7w$8C" role="2OqNvi">
+                          <ref role="3Tt5mk" to="8tt8:6_p$mL233YR" resolve="pos" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="a7P8L" id="48ZGLP7w$b9" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP7w$aW" resolve="TVsP" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
             <node concept="3Aq9E8" id="6_p$mL23i1E" role="1nLNMd">
               <node concept="3I6sU6" id="6_p$mL23i1F" role="3Ip0Jz">
                 <node concept="3I6s7M" id="6_p$mL23i2i" role="3I6sU7">
@@ -2372,29 +2526,6 @@
                 </node>
               </node>
             </node>
-            <node concept="3Aq93q" id="48ZGLP7wzyx" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="48ZGLP7wzyy" role="3Ip0Jz">
-                <node concept="3I6s7M" id="48ZGLP7wzyX" role="3I6sU7">
-                  <node concept="3Aqt3T" id="48ZGLP7wzyW" role="3I6s78">
-                    <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
-                    <node concept="3BlFb$" id="48ZGLP7wzz0" role="3AunhB">
-                      <node concept="2OqwBi" id="48ZGLP7wzFy" role="3BlFb_">
-                        <node concept="3A2sRY" id="48ZGLP7wzz7" role="2Oq$k0">
-                          <ref role="3A2yKK" node="6_p$mL23fzC" resolve="ite" />
-                        </node>
-                        <node concept="3TrEf2" id="48ZGLP7w$8C" role="2OqNvi">
-                          <ref role="3Tt5mk" to="8tt8:6_p$mL233YR" resolve="pos" />
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="a7P8L" id="48ZGLP7w$b9" role="3AunhB">
-                      <ref role="a7OzE" node="48ZGLP7w$aW" resolve="TVsP" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
           </node>
         </node>
       </node>
@@ -2549,33 +2680,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="48ZGLP7ph5I" role="8PkJo">
-      <property role="TrG5h" value="newTypeVars" />
-      <node concept="1zAUYm" id="48ZGLP7pibx" role="1zAUyy">
-        <property role="TrG5h" value="node" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7phpp" role="1zAUyy">
-        <property role="TrG5h" value="introducedTypeVars" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="JqEP$8kz$w" role="8PkJo">
-      <property role="TrG5h" value="varTypeName" />
-      <node concept="1zAUYm" id="JqEP$8kzCM" role="1zAUyy">
-        <property role="TrG5h" value="varType" />
-      </node>
-      <node concept="1zAUYm" id="JqEP$8kzCK" role="1zAUyy">
-        <property role="TrG5h" value="name" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="JqEP$8pb_j" role="8PkJo">
-      <property role="TrG5h" value="varTypeNameConflict" />
-      <node concept="1zAUYm" id="JqEP$8pbI8" role="1zAUyy">
-        <property role="TrG5h" value="varType" />
-      </node>
-      <node concept="1zAUYm" id="JqEP$8pbIa" role="1zAUyy">
-        <property role="TrG5h" value="conflictName" />
-      </node>
-    </node>
     <node concept="1nLNMY" id="JqEP$8skVQ" role="1nK1Vg">
       <property role="TrG5h" value="typeOf_Pair" />
       <node concept="3clFbS" id="JqEP$8skVR" role="1nLNMH">
@@ -2775,379 +2879,286 @@
         </node>
       </node>
     </node>
-    <node concept="1X3_iC" id="PORTCHXIGA" role="lGtFl">
+    <node concept="1X3_iC" id="1IKbs5XlgxQ" role="lGtFl">
       <property role="3V$3am" value="template" />
       <property role="3V$3ak" value="c4803b19-6d89-4a3b-bf82-390769514add/8335224865066015764/3575255234175157601" />
-      <node concept="1nLNMY" id="6$MtiK8IMVN" role="8Wnug">
+      <node concept="1nLNMY" id="1IKbs5XkwLY" role="8Wnug">
         <property role="TrG5h" value="typeoOf_App" />
-        <node concept="3clFbS" id="6$MtiK8IMVO" role="1nLNMH">
-          <node concept="1nLNNL" id="6$MtiK8IMVP" role="3cqZAp">
-            <node concept="1nLNMm" id="6$MtiK8IMVQ" role="1nLNNK">
-              <node concept="0eUR_" id="6K6UrSyHVK4" role="0UC6o">
-                <node concept="3NuqgR" id="44a9n8ErWrx" role="0eVf_">
-                  <node concept="aZer4" id="44a9n8ErWry" role="3XD1gS">
+        <node concept="3clFbS" id="1IKbs5XkwLZ" role="1nLNMH">
+          <node concept="1nLNNL" id="1IKbs5XkwM0" role="3cqZAp">
+            <node concept="1nLNMm" id="1IKbs5XkwM1" role="1nLNNK">
+              <node concept="0eUR_" id="1IKbs5XkwM2" role="0UC6o">
+                <node concept="3NuqgR" id="1IKbs5XkwM3" role="0eVf_">
+                  <node concept="aZer4" id="1IKbs5XkwM4" role="3XD1gS">
                     <property role="TrG5h" value="F" />
                   </node>
-                  <node concept="aZer4" id="44a9n8ErWrT" role="3XD1gS">
+                  <node concept="aZer4" id="1IKbs5XkwM5" role="3XD1gS">
                     <property role="TrG5h" value="A" />
                   </node>
                 </node>
-                <node concept="3NuqgR" id="44a9n8Es2A6" role="0eVf_">
-                  <node concept="aZer4" id="44a9n8Es2A7" role="3XD1gS">
+                <node concept="3NuqgR" id="1IKbs5XkwM6" role="0eVf_">
+                  <node concept="aZer4" id="1IKbs5XkwM7" role="3XD1gS">
                     <property role="TrG5h" value="FA" />
                   </node>
-                  <node concept="aZer4" id="44a9n8Es2Aj" role="3XD1gS">
+                  <node concept="aZer4" id="1IKbs5XkwM8" role="3XD1gS">
                     <property role="TrG5h" value="FR" />
                   </node>
-                  <node concept="aZer4" id="3Lj6UsgFxni" role="3XD1gS">
+                  <node concept="aZer4" id="1IKbs5XkwM9" role="3XD1gS">
                     <property role="TrG5h" value="FI" />
                   </node>
-                  <node concept="aZer4" id="3Lj6UsgFFuW" role="3XD1gS">
-                    <property role="TrG5h" value="AI" />
+                  <node concept="aZer4" id="1IKbs5XkwMa" role="3XD1gS">
+                    <property role="TrG5h" value="AG" />
                   </node>
                 </node>
-                <node concept="3NuqgR" id="WBEjvSTpvn" role="0eVf_">
-                  <node concept="aZer4" id="WBEjvSTpvo" role="3XD1gS">
+                <node concept="3NuqgR" id="1IKbs5XkwMb" role="0eVf_">
+                  <node concept="aZer4" id="1IKbs5XkwMc" role="3XD1gS">
                     <property role="TrG5h" value="E" />
                   </node>
-                  <node concept="17QB3L" id="WBEjvSTpvE" role="3vLBG7" />
+                  <node concept="17QB3L" id="1IKbs5XkwMd" role="3vLBG7" />
                 </node>
-                <node concept="3NuqgR" id="48ZGLP7pqX6" role="0eVf_">
-                  <node concept="aZer4" id="48ZGLP7pqXQ" role="3XD1gS">
+                <node concept="3NuqgR" id="1IKbs5XkwMe" role="0eVf_">
+                  <node concept="aZer4" id="1IKbs5XkwMf" role="3XD1gS">
                     <property role="TrG5h" value="TVsF" />
                   </node>
-                  <node concept="aZer4" id="48ZGLP7zPYF" role="3XD1gS">
+                  <node concept="aZer4" id="1IKbs5XkwMg" role="3XD1gS">
                     <property role="TrG5h" value="TVsA" />
                   </node>
-                  <node concept="aZer4" id="48ZGLP7zPYS" role="3XD1gS">
+                  <node concept="aZer4" id="1IKbs5XkwMh" role="3XD1gS">
                     <property role="TrG5h" value="TVs" />
                   </node>
                 </node>
-                <node concept="3NuqgR" id="48ZGLP7zRTq" role="0eVf_">
-                  <node concept="aZer4" id="48ZGLP7zRTr" role="3XD1gS">
+                <node concept="3NuqgR" id="1IKbs5XkwMi" role="0eVf_">
+                  <node concept="aZer4" id="1IKbs5XkwMj" role="3XD1gS">
                     <property role="TrG5h" value="ITVsF" />
                   </node>
-                  <node concept="aZer4" id="48ZGLP7zRTQ" role="3XD1gS">
-                    <property role="TrG5h" value="ITVsA" />
-                  </node>
-                </node>
-                <node concept="3NuqgR" id="48ZGLP7zSrz" role="0eVf_">
-                  <node concept="aZer4" id="48ZGLP7zSr$" role="3XD1gS">
-                    <property role="TrG5h" value="TVs1" />
-                  </node>
-                  <node concept="aZer4" id="48ZGLP7zSrW" role="3XD1gS">
-                    <property role="TrG5h" value="TVs2" />
-                  </node>
-                  <node concept="aZer4" id="48ZGLP7zSyV" role="3XD1gS">
-                    <property role="TrG5h" value="TVs3" />
-                  </node>
                 </node>
               </node>
-              <node concept="3Aq93q" id="44a9n8ErWrt" role="1nLNMb">
+              <node concept="3Aq93q" id="1IKbs5XkwMp" role="1nLNMb">
                 <property role="3ArMco" value="true" />
-                <node concept="3I6sU6" id="WBEjvSTmqr" role="3Ip0Jz">
-                  <node concept="3I6s7M" id="WBEjvSTmqs" role="3I6sU7">
-                    <node concept="3Aqt3T" id="4KALGUEh0c9" role="3I6s78">
-                      <ref role="3AqCNq" node="4KALGUEgLbG" />
-                      <node concept="3BlFb$" id="4KALGUEh0c4" role="3AunhB">
-                        <node concept="2OqwBi" id="4KALGUEh0c5" role="3BlFb_">
-                          <node concept="3A2sRY" id="4KALGUEh0c6" role="2Oq$k0">
-                            <ref role="3A2yKK" node="44a9n8ErWrh" />
+                <node concept="3I6sU6" id="1IKbs5XkwMq" role="3Ip0Jz">
+                  <node concept="3I6s7M" id="1IKbs5XkwMr" role="3I6sU7">
+                    <node concept="3Aqt3T" id="1IKbs5XkwMs" role="3I6s78">
+                      <ref role="3AqCNq" node="4KALGUEgLbG" resolve="typeOf" />
+                      <node concept="3BlFb$" id="1IKbs5XkwMt" role="3AunhB">
+                        <node concept="2OqwBi" id="1IKbs5XkwMu" role="3BlFb_">
+                          <node concept="3A2sRY" id="1IKbs5XkwMv" role="2Oq$k0">
+                            <ref role="3A2yKK" node="1IKbs5XkwOt" resolve="app" />
                           </node>
-                          <node concept="3TrEf2" id="4KALGUEh0c7" role="2OqNvi">
+                          <node concept="3TrEf2" id="1IKbs5XkwMw" role="2OqNvi">
                             <ref role="3Tt5mk" to="8tt8:7_8aRkgDGPL" resolve="fun" />
                           </node>
                         </node>
                       </node>
-                      <node concept="a7P8L" id="4KALGUEh0c8" role="3AunhB">
-                        <ref role="a7OzE" node="44a9n8ErWry" />
+                      <node concept="a7P8L" id="1IKbs5XkwMx" role="3AunhB">
+                        <ref role="a7OzE" node="1IKbs5XkwM4" resolve="F" />
                       </node>
                     </node>
                   </node>
-                  <node concept="3I6s7M" id="WBEjvSTmqt" role="3I6sU7">
-                    <node concept="3Aqt3T" id="4KALGUEh0b1" role="3I6s78">
-                      <ref role="3AqCNq" node="4KALGUEgLbG" />
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-                              <ref role="a7OzE" node="48ZGLP7zSyV" />
-                            </node>
-                          </node>
-                        </node>
-                      </node>
-                      <node concept="1X3_iC" id="PORTCHOBY8" role="lGtFl">
-                        <property role="3V$3am" value="statement" />
-                        <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
-                        <node concept="3Aqczg" id="48ZGLP8pIwN" role="8Wnug">
-                          <node concept="3GeI9q" id="48ZGLP7zSj7" role="3Aqpz8">
-                            <node concept="a7P8L" id="48ZGLP7zSjT" role="3GeI8F">
-                              <ref role="a7OzE" node="48ZGLP7zPYS" />
-                            </node>
-                            <node concept="ns1u0" id="48ZGLP7zSjY" role="3GeI8D">
-                              <ref role="ns1xF" node="48ZGLP7pl6j" />
-                              <node concept="nsMwS" id="48ZGLP7zSk0" role="ns1xD">
-                                <ref role="nsMwP" node="48ZGLP7pl6$" />
-                                <node concept="1nq8_$" id="48ZGLP7zSk6" role="nsMwV">
-                                  <node concept="a7P8L" id="48ZGLP7zSk4" role="1nq8_t">
-                                    <ref role="a7OzE" node="44a9n8Es2Aj" />
-                                  </node>
+                          <node concept="ns1u0" id="1IKbs5XkwO1" role="3GeI8D">
+                            <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                            <node concept="nsMwS" id="1IKbs5XkwO2" role="ns1xD">
+                              <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
+                              <node concept="1nq8_$" id="1IKbs5XkwO3" role="nsMwV">
+                                <node concept="a7P8L" id="1IKbs5XkwO4" role="1nq8_t">
+                                  <ref role="a7OzE" node="1IKbs5XkwM8" resolve="FR" />
                                 </node>
                               </node>
-                              <node concept="nsMwS" id="48ZGLP7zSkd" role="ns1xD">
-                                <ref role="nsMwP" node="48ZGLP7pl6J" />
-                                <node concept="1nq8_$" id="48ZGLP7zSkJ" role="nsMwV">
-                                  <node concept="a7P8L" id="48ZGLP7zSzs" role="1nq8_t">
-                                    <ref role="a7OzE" node="48ZGLP7zSyV" />
-                                  </node>
+                            </node>
+                            <node concept="nsMwS" id="1IKbs5XkwO5" role="ns1xD">
+                              <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
+                              <node concept="1nq8_$" id="1IKbs5XkwO6" role="nsMwV">
+                                <node concept="a7P8L" id="1IKbs5XkyoV" role="1nq8_t">
+                                  <ref role="a7OzE" node="1IKbs5XkwMh" resolve="TVs" />
                                 </node>
                               </node>
                             </node>
                           </node>
                         </node>
                       </node>
-                      <node concept="3Aqczg" id="PORTCHOCeH" role="3cqZAp">
-                        <node concept="3GeI9q" id="PORTCHOCeI" role="3Aqpz8">
-                          <node concept="a7P8L" id="PORTCHOCeJ" role="3GeI8F">
-                            <ref role="a7OzE" node="48ZGLP7zPYS" />
-                          </node>
-                          <node concept="ns1u0" id="PORTCHOCeK" role="3GeI8D">
-                            <ref role="ns1xF" node="48ZGLP7pl6j" />
-                            <node concept="nsMwS" id="PORTCHOCeL" role="ns1xD">
-                              <ref role="nsMwP" node="48ZGLP7pl6$" />
-                              <node concept="1nq8_$" id="PORTCHOCeM" role="nsMwV">
-                                <node concept="a7P8L" id="PORTCHOCeN" role="1nq8_t">
-                                  <ref role="a7OzE" node="44a9n8Es2Aj" resolve="FR" />
-                                </node>
-                              </node>
-                            </node>
-                            <node concept="nsMwS" id="PORTCHOCeO" role="ns1xD">
-                              <ref role="nsMwP" node="48ZGLP7pl6J" />
-                              <node concept="1nq8_$" id="PORTCHOCeP" role="nsMwV">
-                                <node concept="a7P8L" id="PORTCHOChI" role="1nq8_t">
-                                  <ref role="a7OzE" node="48ZGLP7zSrW" />
-                                </node>
-                              </node>
+                      <node concept="3Aqczg" id="1IKbs5XkwO8" role="3cqZAp">
+                        <node concept="3Aqt3T" id="1IKbs5XkwO9" role="3Aqpz8">
+                          <ref role="3AqCNq" node="48ZGLP7ph5I" resolve="newTypeVars" />
+                          <node concept="3BlFb$" id="1IKbs5XkwOa" role="3AunhB">
+                            <node concept="3A2sRY" id="1IKbs5XkwOb" role="3BlFb_">
+                              <ref role="3A2yKK" node="1IKbs5XkwOt" resolve="app" />
                             </node>
                           </node>
-                        </node>
-                      </node>
-                      <node concept="3Aqczg" id="48ZGLP8pIwO" role="3cqZAp">
-                        <node concept="3Aqt3T" id="48ZGLP7prwp" role="3Aqpz8">
-                          <ref role="3AqCNq" node="48ZGLP7ph5I" />
-                          <node concept="3BlFb$" id="48ZGLP7wzy6" role="3AunhB">
-                            <node concept="3A2sRY" id="48ZGLP7wzyp" role="3BlFb_">
-                              <ref role="3A2yKK" node="44a9n8ErWrh" />
-                            </node>
-                          </node>
-                          <node concept="a7P8L" id="48ZGLP7zSzz" role="3AunhB">
-                            <ref role="a7OzE" node="48ZGLP7zPYS" />
+                          <node concept="a7P8L" id="1IKbs5XkwOc" role="3AunhB">
+                            <ref role="a7OzE" node="1IKbs5XkwMh" resolve="TVs" />
                           </node>
                         </node>
                       </node>
@@ -3155,33 +3166,33 @@
                   </node>
                 </node>
               </node>
-              <node concept="3Aq9E8" id="N6wx6Hp2i_" role="1nLNMd">
-                <node concept="3I6sU6" id="N6wx6Hp2j6" role="3Ip0Jz">
-                  <node concept="3I6s7M" id="6K6UrSyIe0s" role="3I6sU7">
-                    <node concept="3wWvb2" id="6K6UrSyIe0r" role="3I6s78">
-                      <node concept="2OqwBi" id="6K6UrSyIerA" role="3wWo3s">
-                        <node concept="3A2sRY" id="6K6UrSyIeje" role="2Oq$k0">
-                          <ref role="3A2yKK" node="44a9n8ErWrh" />
+              <node concept="3Aq9E8" id="1IKbs5XkwOd" role="1nLNMd">
+                <node concept="3I6sU6" id="1IKbs5XkwOe" role="3Ip0Jz">
+                  <node concept="3I6s7M" id="1IKbs5XkwOf" role="3I6sU7">
+                    <node concept="3wWvb2" id="1IKbs5XkwOg" role="3I6s78">
+                      <node concept="2OqwBi" id="1IKbs5XkwOh" role="3wWo3s">
+                        <node concept="3A2sRY" id="1IKbs5XkwOi" role="2Oq$k0">
+                          <ref role="3A2yKK" node="1IKbs5XkwOt" resolve="app" />
                         </node>
-                        <node concept="2s7oft" id="6K6UrSyIeTu" role="2OqNvi">
+                        <node concept="2s7oft" id="1IKbs5XkwOj" role="2OqNvi">
                           <property role="2s7ueQ" value="error" />
-                          <node concept="2YIFZM" id="6K6UrSyIfsz" role="2s7u9n">
-                            <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
+                          <node concept="2YIFZM" id="1IKbs5XkwOk" role="2s7u9n">
                             <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...):java.lang.String" resolve="format" />
-                            <node concept="Xl_RD" id="6K6UrSyIfs$" role="37wK5m">
+                            <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
+                            <node concept="Xl_RD" id="1IKbs5XkwOl" role="37wK5m">
                               <property role="Xl_RC" value="cannot unify '%s' and '%s'" />
                             </node>
-                            <node concept="1TmgYN" id="6K6UrSyIfs_" role="37wK5m">
-                              <node concept="1nq8_$" id="6K6UrSyIfsA" role="1Tms7$">
-                                <node concept="a7P8L" id="6K6UrSyIfsB" role="1nq8_t">
-                                  <ref role="a7OzE" node="44a9n8Es2A7" />
+                            <node concept="1TmgYN" id="1IKbs5XkwOm" role="37wK5m">
+                              <node concept="1nq8_$" id="1IKbs5XkwOn" role="1Tms7$">
+                                <node concept="a7P8L" id="1IKbs5XkwOo" role="1nq8_t">
+                                  <ref role="a7OzE" node="1IKbs5XkwM7" resolve="FA" />
                                 </node>
                               </node>
                             </node>
-                            <node concept="1TmgYN" id="6K6UrSyIfsC" role="37wK5m">
-                              <node concept="1nq8_$" id="6K6UrSyIfsD" role="1Tms7$">
-                                <node concept="a7P8L" id="6K6UrSyIfsE" role="1nq8_t">
-                                  <ref role="a7OzE" node="44a9n8ErWrT" />
+                            <node concept="1TmgYN" id="1IKbs5XkwOp" role="37wK5m">
+                              <node concept="1nq8_$" id="1IKbs5XkwOq" role="1Tms7$">
+                                <node concept="a7P8L" id="1IKbs5XkwOr" role="1nq8_t">
+                                  <ref role="a7OzE" node="1IKbs5XkwM5" resolve="A" />
                                 </node>
                               </node>
                             </node>
@@ -3195,9 +3206,9 @@
             </node>
           </node>
         </node>
-        <node concept="2t___k" id="44a9n8ErWrg" role="1nLNMg">
+        <node concept="2t___k" id="1IKbs5XkwOs" role="1nLNMg">
           <ref role="2t_S0q" to="8tt8:7_8aRkgDGPK" resolve="App" />
-          <node concept="3A20r5" id="44a9n8ErWrh" role="2t_VXX">
+          <node concept="3A20r5" id="1IKbs5XkwOt" role="2t_VXX">
             <property role="TrG5h" value="app" />
           </node>
         </node>
@@ -3715,6 +3726,18 @@
         <property role="TrG5h" value="type" />
       </node>
     </node>
+    <node concept="3AqmO8" id="48ZGLP7rIE2" role="8PkJo">
+      <property role="TrG5h" value="recoverTypeVars" />
+      <node concept="1zAUYm" id="48ZGLP7rIKj" role="1zAUyy">
+        <property role="TrG5h" value="nlist" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7rIKl" role="1zAUyy">
+        <property role="TrG5h" value="varNames" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7rIKo" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+    </node>
     <node concept="1nLNMY" id="6$MtiK8IMUZ" role="1nK1Vg">
       <property role="TrG5h" value="expr_typeNode" />
       <node concept="3clFbS" id="6$MtiK8IMV0" role="1nLNMH">
@@ -4751,7 +4774,6 @@
               </node>
             </node>
             <node concept="3Aq93q" id="4dPZ2m2i60h" role="1nLNMb">
-              <property role="3ArMco" value="false" />
               <node concept="3I6sU6" id="4dPZ2m2i60p" role="3Ip0Jz">
                 <node concept="3I6s7M" id="4dPZ2m2i60r" role="3I6sU7">
                   <node concept="3Aqt3T" id="4dPZ2m2i60I" role="3I6s78">
@@ -4836,7 +4858,6 @@
               </node>
             </node>
             <node concept="3Aq93q" id="4dPZ2m2i6h9" role="1nLNMb">
-              <property role="3ArMco" value="false" />
               <node concept="3I6sU6" id="4dPZ2m2i6hh" role="3Ip0Jz">
                 <node concept="3I6s7M" id="4dPZ2m2i6hn" role="3I6sU7">
                   <node concept="3Aqt3T" id="4dPZ2m2i6hr" role="3I6s78">
@@ -5410,18 +5431,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="48ZGLP7rIE2" role="8PkJo">
-      <property role="TrG5h" value="recoverTypeVars" />
-      <node concept="1zAUYm" id="48ZGLP7rIKj" role="1zAUyy">
-        <property role="TrG5h" value="nlist" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7rIKl" role="1zAUyy">
-        <property role="TrG5h" value="varNames" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7rIKo" role="1zAUyy">
-        <property role="TrG5h" value="typeVars" />
-      </node>
-    </node>
     <node concept="1nLNMY" id="48ZGLP7rIM_" role="1nK1Vg">
       <property role="TrG5h" value="recoverTypeVars" />
       <node concept="3clFbS" id="48ZGLP7rIMA" role="1nLNMH">
@@ -5622,6 +5631,45 @@
         <property role="TrG5h" value="typeVars" />
       </node>
     </node>
+    <node concept="3AqmO8" id="48ZGLP7pk5w" role="8PkJo">
+      <property role="TrG5h" value="freeTypeVars" />
+      <node concept="1zAUYm" id="48ZGLP7pkpg" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7plaN" role="1zAUyy">
+        <property role="TrG5h" value="freeTypeVars" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7OIYg" role="1zAUyy">
+        <property role="TrG5h" value="varNames" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="48ZGLP7pl5A" role="8PkJo">
+      <property role="TrG5h" value="append" />
+      <node concept="1zAUYm" id="48ZGLP7ppGW" role="1zAUyy">
+        <property role="TrG5h" value="xs" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7ppGY" role="1zAUyy">
+        <property role="TrG5h" value="ys" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7ppH1" role="1zAUyy">
+        <property role="TrG5h" value="result" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="48ZGLP7pAI2" role="8PkJo">
+      <property role="TrG5h" value="instTypeVars" />
+      <node concept="1zAUYm" id="48ZGLP7pAIo" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7pAIq" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7pAJr" role="1zAUyy">
+        <property role="TrG5h" value="result" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP7zRHp" role="1zAUyy">
+        <property role="TrG5h" value="resultTypeVars" />
+      </node>
+    </node>
     <node concept="1nLNMY" id="48ZGLP7ppCW" role="1nK1Vg">
       <property role="TrG5h" value="append_baseCase" />
       <node concept="3clFbS" id="48ZGLP7ppCX" role="1nLNMH">
@@ -7210,7 +7258,7 @@
       </node>
     </node>
     <node concept="1nLNMY" id="6$MtiK8IMUV" role="1nK1Vg">
-      <property role="TrG5h" value="inst" />
+      <property role="TrG5h" value="inst_dummy" />
       <node concept="3clFbS" id="6$MtiK8IMUW" role="1nLNMH">
         <node concept="1nLNNL" id="6$MtiK8IMUX" role="3cqZAp">
           <node concept="1nLNMm" id="6$MtiK8IMUY" role="1nLNNK">
@@ -7284,45 +7332,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="48ZGLP7pk5w" role="8PkJo">
-      <property role="TrG5h" value="freeTypeVars" />
-      <node concept="1zAUYm" id="48ZGLP7pkpg" role="1zAUyy">
-        <property role="TrG5h" value="typeVars" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7plaN" role="1zAUyy">
-        <property role="TrG5h" value="freeTypeVars" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7OIYg" role="1zAUyy">
-        <property role="TrG5h" value="varNames" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="48ZGLP7pl5A" role="8PkJo">
-      <property role="TrG5h" value="append" />
-      <node concept="1zAUYm" id="48ZGLP7ppGW" role="1zAUyy">
-        <property role="TrG5h" value="xs" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7ppGY" role="1zAUyy">
-        <property role="TrG5h" value="ys" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7ppH1" role="1zAUyy">
-        <property role="TrG5h" value="result" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="48ZGLP7pAI2" role="8PkJo">
-      <property role="TrG5h" value="instTypeVars" />
-      <node concept="1zAUYm" id="48ZGLP7pAIo" role="1zAUyy">
-        <property role="TrG5h" value="type" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7pAIq" role="1zAUyy">
-        <property role="TrG5h" value="typeVars" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7pAJr" role="1zAUyy">
-        <property role="TrG5h" value="result" />
-      </node>
-      <node concept="1zAUYm" id="48ZGLP7zRHp" role="1zAUyy">
-        <property role="TrG5h" value="resultTypeVars" />
-      </node>
-    </node>
   </node>
   <node concept="92CTh" id="5Eb7bDWO4vA">
     <property role="TrG5h" value="Typecheck" />
@@ -7423,6 +7432,1367 @@
       <node concept="nspSf" id="48ZGLP7pl6O" role="ns1xx" />
     </node>
   </node>
+  <node concept="AVZre" id="48ZGLP8pG4t">
+    <property role="TrG5h" value="subsumption" />
+    <node concept="3AqmO8" id="48ZGLP8pG4u" role="8PkJo">
+      <property role="TrG5h" value="subsumed" />
+      <node concept="1zAUYm" id="48ZGLP8pG4w" role="1zAUyy">
+        <property role="TrG5h" value="ta" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP8pG4A" role="1zAUyy">
+        <property role="TrG5h" value="tb" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="48ZGLP8SeQb" role="8PkJo">
+      <property role="TrG5h" value="uniForallFail" />
+    </node>
+    <node concept="3AqmO8" id="48ZGLP92BQW" role="8PkJo">
+      <property role="TrG5h" value="renameTypeVars" />
+      <node concept="1zAUYm" id="48ZGLP92BR5" role="1zAUyy">
+        <property role="TrG5h" value="toRename" />
+      </node>
+      <node concept="1zAUYm" id="48ZGLP92BR7" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+    </node>
+    <node concept="1nLNMY" id="48ZGLP92BRC" role="1nK1Vg">
+      <property role="TrG5h" value="renameTypeVars" />
+      <node concept="3clFbS" id="48ZGLP92BRD" role="1nLNMH">
+        <node concept="3SKdUt" id="1IKbs5Xii5q" role="3cqZAp">
+          <node concept="3SKdUq" id="1IKbs5Xii5s" role="3SKWNk">
+            <property role="3SKdUp" value="Don't touch bound terms --- that's the difference with checkTypeVars" />
+          </node>
+        </node>
+        <node concept="1nLNNL" id="48ZGLP92BZ_" role="3cqZAp">
+          <node concept="1nLNMm" id="48ZGLP92BZA" role="1nLNNK">
+            <node concept="0eUR_" id="48ZGLP92BZE" role="0UC6o">
+              <node concept="3NuqgR" id="48ZGLP92BZG" role="0eVf_">
+                <node concept="aZer4" id="48ZGLP92BZH" role="3XD1gS">
+                  <property role="TrG5h" value="ITVs" />
+                </node>
+                <node concept="aZer4" id="48ZGLP92BZN" role="3XD1gS">
+                  <property role="TrG5h" value="TVs" />
+                </node>
+              </node>
+              <node concept="3NuqgR" id="48ZGLP92BZZ" role="0eVf_">
+                <node concept="aZer4" id="48ZGLP92C00" role="3XD1gS">
+                  <property role="TrG5h" value="TVar" />
+                </node>
+                <node concept="aZer4" id="48ZGLP92C0y" role="3XD1gS">
+                  <property role="TrG5h" value="UniVar" />
+                </node>
+                <node concept="aZer4" id="48ZGLP92C0F" role="3XD1gS">
+                  <property role="TrG5h" value="TVsTail" />
+                </node>
+                <node concept="aZer4" id="48ZGLP92C17" role="3XD1gS">
+                  <property role="TrG5h" value="ITVsTail" />
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq93q" id="48ZGLP92C1r" role="1nLNMb">
+              <node concept="3I6sU6" id="48ZGLP92C1s" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP92C1w" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP92C1v" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="1HFMs5" id="48ZGLP92C23" role="3AunhB">
+                      <node concept="a7P8L" id="48ZGLP92C1C" role="1uarlU">
+                        <ref role="a7OzE" node="48ZGLP92BZH" resolve="ITVs" />
+                      </node>
+                      <node concept="ns1u0" id="48ZGLP92C2g" role="1uarlW">
+                        <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                        <node concept="nsMwS" id="48ZGLP92C2i" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
+                          <node concept="1nq8_$" id="48ZGLP92C2o" role="nsMwV">
+                            <node concept="a7P8L" id="48ZGLP92C2m" role="1nq8_t">
+                              <ref role="a7OzE" node="48ZGLP92C0y" resolve="UniVar" />
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="nsMwS" id="48ZGLP92C2v" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
+                          <node concept="1nq8_$" id="48ZGLP92C2C" role="nsMwV">
+                            <node concept="a7P8L" id="48ZGLP92C2A" role="1nq8_t">
+                              <ref role="a7OzE" node="48ZGLP92C17" resolve="ITVsTail" />
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="1HFMs5" id="48ZGLP92C2K" role="3AunhB">
+                      <node concept="a7P8L" id="48ZGLP92C1I" role="1uarlU">
+                        <ref role="a7OzE" node="48ZGLP92BZN" resolve="TVs" />
+                      </node>
+                      <node concept="ns1u0" id="48ZGLP92C35" role="1uarlW">
+                        <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                        <node concept="nsMwS" id="48ZGLP92C37" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
+                          <node concept="1nq8_$" id="48ZGLP92C3s" role="nsMwV">
+                            <node concept="a7P8L" id="48ZGLP92C3q" role="1nq8_t">
+                              <ref role="a7OzE" node="48ZGLP92C00" resolve="TVar" />
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="nsMwS" id="48ZGLP92C3b" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
+                          <node concept="1nq8_$" id="48ZGLP92C3j" role="nsMwV">
+                            <node concept="a7P8L" id="48ZGLP92C3h" role="1nq8_t">
+                              <ref role="a7OzE" node="48ZGLP92C0F" resolve="TVsTail" />
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9E8" id="48ZGLP92C1O" role="1nLNMd">
+              <node concept="3I6sU6" id="48ZGLP92C1P" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP92C4X" role="3I6sU7">
+                  <node concept="3A8Hvi" id="48ZGLP92C4U" role="3I6s78">
+                    <node concept="a7P8L" id="48ZGLP92C52" role="3A8wtg">
+                      <ref role="a7OzE" node="48ZGLP92C0y" resolve="UniVar" />
+                    </node>
+                    <node concept="ns1u0" id="48ZGLP92C5c" role="3A8w4Q">
+                      <ref role="ns1xF" node="48ZGLP8wdTf" resolve="VarRef" />
+                      <node concept="nsMwS" id="48ZGLP92C5l" role="ns1xD">
+                        <ref role="nsMwP" node="48ZGLP8wdUk" resolve="def" />
+                        <node concept="1nq8_$" id="48ZGLP92C5r" role="nsMwV">
+                          <node concept="a7P8L" id="48ZGLP92C5p" role="1nq8_t">
+                            <ref role="a7OzE" node="48ZGLP92C00" resolve="TVar" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+                <node concept="3I6s7M" id="48ZGLP92C7d" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP92C7b" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="a7P8L" id="48ZGLP92C7p" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP92C17" resolve="ITVsTail" />
+                    </node>
+                    <node concept="a7P8L" id="48ZGLP92C7x" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP92C0F" resolve="TVsTail" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9_M" id="48ZGLP92C1U" role="1nLNMa">
+              <node concept="3I6sU6" id="48ZGLP92C1V" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP92C1Z" role="3I6sU7">
+                  <node concept="2aLmEc" id="48ZGLP92C1Y" role="3I6s78">
+                    <node concept="a7P8L" id="48ZGLP92C3z" role="2aLmnP">
+                      <ref role="a7OzE" node="48ZGLP92C0y" resolve="UniVar" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="1IKbs5XjNjJ" role="3cqZAp" />
+        <node concept="3SKdUt" id="48ZGLP92Ccc" role="3cqZAp">
+          <node concept="3SKdUq" id="48ZGLP92Cdd" role="3SKWNk">
+            <property role="3SKdUp" value="same length is guaranteed by caller" />
+          </node>
+        </node>
+        <node concept="1nLNNL" id="48ZGLP92C9Y" role="3cqZAp">
+          <node concept="1nLNMm" id="48ZGLP92Ca0" role="1nLNNK">
+            <node concept="3Aq93q" id="48ZGLP92CaV" role="1nLNMb">
+              <node concept="3I6sU6" id="48ZGLP92CaW" role="3Ip0Jz">
+                <node concept="3I6s7M" id="48ZGLP92Cb0" role="3I6sU7">
+                  <node concept="3Aqt3T" id="48ZGLP92CaZ" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="ns1u0" id="48ZGLP92Cb5" role="3AunhB">
+                      <ref role="ns1xF" node="48ZGLP7pl6N" resolve="Nil" />
+                    </node>
+                    <node concept="ns1u0" id="48ZGLP92Cba" role="3AunhB">
+                      <ref role="ns1xF" node="48ZGLP7pl6N" resolve="Nil" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1nLNMY" id="PORTCHCQj2" role="1nK1Vg">
+      <property role="TrG5h" value="renameTypeVars_rigid" />
+      <node concept="3clFbS" id="PORTCHCQj3" role="1nLNMH">
+        <node concept="1nLNNL" id="PORTCHCQj4" role="3cqZAp">
+          <node concept="1nLNMm" id="PORTCHCQj5" role="1nLNNK">
+            <node concept="3Aq9E8" id="PORTCHCQMl" role="1nLNMd">
+              <node concept="3I6sU6" id="PORTCHCQMm" role="3Ip0Jz">
+                <node concept="3I6s7M" id="PORTCHCQjB" role="3I6sU7">
+                  <node concept="3A8Hvi" id="PORTCHCQjC" role="3I6s78">
+                    <node concept="a7P8L" id="PORTCHCQjD" role="3A8wtg">
+                      <ref role="a7OzE" node="PORTCHCQjc" resolve="Rigid" />
+                    </node>
+                    <node concept="ns1u0" id="PORTCHCQjE" role="3A8w4Q">
+                      <ref role="ns1xF" node="48ZGLP8wdTf" resolve="VarRef" />
+                      <node concept="nsMwS" id="PORTCHCQjF" role="ns1xD">
+                        <ref role="nsMwP" node="48ZGLP8wdUk" resolve="def" />
+                        <node concept="1nq8_$" id="PORTCHCQjG" role="nsMwV">
+                          <node concept="a7P8L" id="PORTCHCQjH" role="1nq8_t">
+                            <ref role="a7OzE" node="PORTCHCQjb" resolve="TVar" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+                <node concept="3I6s7M" id="PORTCHCQjI" role="3I6sU7">
+                  <node concept="3Aqt3T" id="PORTCHCQjJ" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="a7P8L" id="PORTCHCQjK" role="3AunhB">
+                      <ref role="a7OzE" node="PORTCHCQje" resolve="ITVsTail" />
+                    </node>
+                    <node concept="a7P8L" id="PORTCHCQjL" role="3AunhB">
+                      <ref role="a7OzE" node="PORTCHCQjd" resolve="TVsTail" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="0eUR_" id="PORTCHCQj6" role="0UC6o">
+              <node concept="3NuqgR" id="PORTCHCQj7" role="0eVf_">
+                <node concept="aZer4" id="PORTCHCQj8" role="3XD1gS">
+                  <property role="TrG5h" value="ITVs" />
+                </node>
+                <node concept="aZer4" id="PORTCHCQj9" role="3XD1gS">
+                  <property role="TrG5h" value="TVs" />
+                </node>
+              </node>
+              <node concept="3NuqgR" id="PORTCHCQja" role="0eVf_">
+                <node concept="aZer4" id="PORTCHCQjb" role="3XD1gS">
+                  <property role="TrG5h" value="TVar" />
+                </node>
+                <node concept="aZer4" id="PORTCHCQjc" role="3XD1gS">
+                  <property role="TrG5h" value="Rigid" />
+                </node>
+                <node concept="aZer4" id="PORTCHCQjd" role="3XD1gS">
+                  <property role="TrG5h" value="TVsTail" />
+                </node>
+                <node concept="aZer4" id="PORTCHCQje" role="3XD1gS">
+                  <property role="TrG5h" value="ITVsTail" />
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq93q" id="PORTCHCQjf" role="1nLNMb">
+              <node concept="3I6sU6" id="PORTCHCQjg" role="3Ip0Jz">
+                <node concept="3I6s7M" id="PORTCHCQjh" role="3I6sU7">
+                  <node concept="3Aqt3T" id="PORTCHCQji" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="1HFMs5" id="PORTCHCQjj" role="3AunhB">
+                      <node concept="a7P8L" id="PORTCHCQjk" role="1uarlU">
+                        <ref role="a7OzE" node="PORTCHCQj8" resolve="ITVs" />
+                      </node>
+                      <node concept="ns1u0" id="PORTCHCQjl" role="1uarlW">
+                        <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                        <node concept="nsMwS" id="PORTCHCQjm" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
+                          <node concept="1nq8_$" id="PORTCHCQjn" role="nsMwV">
+                            <node concept="a7P8L" id="PORTCHFTc5" role="1nq8_t">
+                              <ref role="a7OzE" node="PORTCHCQjc" resolve="Rigid" />
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="nsMwS" id="PORTCHCQjp" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
+                          <node concept="1nq8_$" id="PORTCHCQjq" role="nsMwV">
+                            <node concept="a7P8L" id="PORTCHCQjr" role="1nq8_t">
+                              <ref role="a7OzE" node="PORTCHCQje" resolve="ITVsTail" />
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="1HFMs5" id="PORTCHCQjs" role="3AunhB">
+                      <node concept="a7P8L" id="PORTCHCQjt" role="1uarlU">
+                        <ref role="a7OzE" node="PORTCHCQj9" resolve="TVs" />
+                      </node>
+                      <node concept="ns1u0" id="PORTCHCQju" role="1uarlW">
+                        <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                        <node concept="nsMwS" id="PORTCHCQjv" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
+                          <node concept="1nq8_$" id="PORTCHCQjw" role="nsMwV">
+                            <node concept="a7P8L" id="PORTCHCQjx" role="1nq8_t">
+                              <ref role="a7OzE" node="PORTCHCQjb" resolve="TVar" />
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="nsMwS" id="PORTCHCQjy" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6J" resolve="tail" />
+                          <node concept="1nq8_$" id="PORTCHCQjz" role="nsMwV">
+                            <node concept="a7P8L" id="PORTCHCQj$" role="1nq8_t">
+                              <ref role="a7OzE" node="PORTCHCQjd" resolve="TVsTail" />
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9E8" id="PORTCHCQj_" role="1nLNMd">
+              <node concept="3I6sU6" id="PORTCHCQjA" role="3Ip0Jz">
+                <node concept="3IrJb3" id="PORTCHCQNC" role="3I6sU7">
+                  <node concept="3clFbS" id="PORTCHCQND" role="3IrJb0">
+                    <node concept="3SKdUt" id="PORTCHCQNG" role="3cqZAp">
+                      <node concept="3SKdUq" id="PORTCHCQNH" role="3SKWNk">
+                        <property role="3SKdUp" value="fail --- can't unify rigid type variables" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9_M" id="PORTCHFTbr" role="1nLNMa">
+              <node concept="3I6sU6" id="PORTCHFTbs" role="3Ip0Jz">
+                <node concept="3I6s7M" id="PORTCHFTby" role="3I6sU7">
+                  <node concept="3A8Hvi" id="PORTCHFTbv" role="3I6s78">
+                    <node concept="a7P8L" id="PORTCHFTbB" role="3A8wtg">
+                      <ref role="a7OzE" node="PORTCHCQjc" resolve="Rigid" />
+                    </node>
+                    <node concept="ns1u0" id="PORTCHFTbG" role="3A8w4Q">
+                      <ref role="ns1xF" node="48ZGLP8wdTf" resolve="VarRef" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1nLNMY" id="1IKbs5Xw9ST" role="1nK1Vg">
+      <property role="TrG5h" value="tryRenameTypeVars" />
+      <node concept="3clFbS" id="1IKbs5Xw9SU" role="1nLNMH">
+        <node concept="1nLNNL" id="1IKbs5Xwa00" role="3cqZAp">
+          <node concept="1nLNMm" id="1IKbs5Xwa01" role="1nLNNK">
+            <node concept="3Aq9E8" id="1IKbs5Xwa02" role="1nLNMd">
+              <node concept="3I6sU6" id="1IKbs5Xwa03" role="3Ip0Jz">
+                <node concept="3I6s7M" id="1IKbs5Xwa43" role="3I6sU7">
+                  <node concept="3A8Hvi" id="1IKbs5Xwa3X" role="3I6s78">
+                    <node concept="a7P8L" id="1IKbs5Xwa4c" role="3A8wtg">
+                      <ref role="a7OzE" node="1IKbs5Xwa0k" resolve="TestITVs" />
+                    </node>
+                    <node concept="9KH4l" id="1IKbs5Xwa4h" role="3A8w4Q">
+                      <node concept="a7P8L" id="1IKbs5Xwa4n" role="9KHbC">
+                        <ref role="a7OzE" node="1IKbs5Xwa0h" resolve="ITVs" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+                <node concept="3I6s7M" id="1IKbs5Xwa4H" role="3I6sU7">
+                  <node concept="3Aqt3T" id="1IKbs5XwTNi" role="3I6s78">
+                    <ref role="3AqCNq" node="48ZGLP92BQW" resolve="renameTypeVars" />
+                    <node concept="a7P8L" id="1IKbs5XwTNr" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0k" resolve="TestITVs" />
+                    </node>
+                    <node concept="a7P8L" id="1IKbs5XwTNz" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0i" resolve="TVs" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="3I6s7M" id="1IKbs5Xwa0b" role="3I6sU7">
+                  <node concept="3Aqt3T" id="1IKbs5Xwa0c" role="3I6s78">
+                    <ref role="3AqCNq" node="1IKbs5XihHK" resolve="checkTypeVars" />
+                    <node concept="a7P8L" id="1IKbs5Xwa5Y" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0h" resolve="ITVs" />
+                    </node>
+                    <node concept="a7P8L" id="1IKbs5Xwa66" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0i" resolve="TVs" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="0eUR_" id="1IKbs5Xwa0f" role="0UC6o">
+              <node concept="3NuqgR" id="1IKbs5Xwa0g" role="0eVf_">
+                <node concept="aZer4" id="1IKbs5Xwa0h" role="3XD1gS">
+                  <property role="TrG5h" value="ITVs" />
+                </node>
+                <node concept="aZer4" id="1IKbs5Xwa0i" role="3XD1gS">
+                  <property role="TrG5h" value="TVs" />
+                </node>
+              </node>
+              <node concept="3NuqgR" id="1IKbs5Xwa0j" role="0eVf_">
+                <node concept="aZer4" id="1IKbs5Xwa0k" role="3XD1gS">
+                  <property role="TrG5h" value="TestITVs" />
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq93q" id="1IKbs5Xwa0o" role="1nLNMb">
+              <node concept="3I6sU6" id="1IKbs5Xwa0p" role="3Ip0Jz">
+                <node concept="3I6s7M" id="1IKbs5Xwa0q" role="3I6sU7">
+                  <node concept="3Aqt3T" id="1IKbs5Xwa0r" role="3I6s78">
+                    <ref role="3AqCNq" node="1IKbs5Xw9SC" resolve="tryRenameTypeVars" />
+                    <node concept="a7P8L" id="1IKbs5Xwa3m" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0h" resolve="ITVs" />
+                    </node>
+                    <node concept="a7P8L" id="1IKbs5Xwa3s" role="3AunhB">
+                      <ref role="a7OzE" node="1IKbs5Xwa0i" resolve="TVs" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1nLNMY" id="1IKbs5XihRK" role="1nK1Vg">
+      <property role="TrG5h" value="checkTypeVars" />
+      <node concept="3clFbS" id="1IKbs5XihRL" role="1nLNMH">
+        <node concept="3SKdUt" id="1IKbs5Xwa80" role="3cqZAp">
+          <node concept="3SKdUq" id="1IKbs5Xwa82" role="3SKWNk">
+            <property role="3SKdUp" value="Same as rename type vars, but doesn't really rename (i.e. unify) free type variables" />
+          </node>
+        </node>
+        <node concept="3SKdUt" id="1IKbs5Xwaka" role="3cqZAp">
+          <node concept="3SKdUq" id="1IKbs5Xwakc" role="3SKWNk">
+            <property role="3SKdUp" value="see tryRenameTypeVars" />
+          </node>
+        </node>
+        <node concept="1nLNNL" id="1IKbs5XihRM" role="3cqZAp">
+          <node concept="1nLNMm" id="1IKbs5XihRN" role="1nLNNK">
+            <node concept="0eUR_" id="1IKbs5XihRO" role="0UC6o">
+              <node concept="3NuqgR" id="1IKbs5XihRP" role="0eVf_">
+                <node concept="aZer4" id="1IKbs5XihRQ" role="3XD1gS">
+                  <property role="TrG5h" value="ITVs" />
+                </node>
+                <node concept="aZer4" id="1IKbs5XihRR" role="3XD1gS">
+                  <property role="TrG5h" value="TVs" />
+                </node>
+              </node>
+              <node concept="3NuqgR" id="1IKbs5XihRS" role="0eVf_">
+                <node concept="aZer4" id="1IKbs5XihRT" role="3XD1gS">
+                  <property role="TrG5h" value="OrigTVar" />
+                </node>
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+                </node>
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+                <node concept="aZer4" id="1IKbs5XihRW" role="3XD1gS">
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+                </node>
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+                        <ref role="a7OzE" node="1IKbs5XihRQ" resolve="ITVs" />
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+                      <node concept="ns1u0" id="1IKbs5XihS3" role="1uarlW">
+                        <ref role="ns1xF" node="48ZGLP7pl6j" resolve="Cons" />
+                        <node concept="nsMwS" id="1IKbs5XihS4" role="ns1xD">
+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
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+                              <ref role="a7OzE" node="1IKbs5XihRU" resolve="TVar" />
+                            </node>
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+                        </node>
+                        <node concept="nsMwS" id="1IKbs5XihS7" role="ns1xD">
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+                              <ref role="a7OzE" node="1IKbs5XihRW" resolve="ITVsTail" />
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+                      <node concept="ns1u0" id="1IKbs5XihSc" role="1uarlW">
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+                          <ref role="nsMwP" node="48ZGLP7pl6$" resolve="head" />
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+                        <node concept="nsMwS" id="1IKbs5XihSg" role="ns1xD">
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+                        <node concept="nsMwS" id="48ZGLP8pHFF" role="ns1xD">
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+    <node concept="1nLNMY" id="PORTCHCRhj" role="1nK1Vg">
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+      <node concept="3clFbS" id="PORTCHCRhk" role="1nLNMH">
+        <node concept="1nLNNL" id="PORTCHCRLC" role="3cqZAp">
+          <node concept="1nLNMm" id="PORTCHCRLD" role="1nLNNK">
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+                <node concept="aZer4" id="PORTCHCRLK" role="3XD1gS">
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+                <node concept="aZer4" id="PORTCHCRLT" role="3XD1gS">
+                  <property role="TrG5h" value="R" />
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+              </node>
+            </node>
+            <node concept="3Aq93q" id="PORTCHCRM5" role="1nLNMb">
+              <property role="3ArMco" value="true" />
+              <node concept="3I6sU6" id="PORTCHCRM6" role="3Ip0Jz">
+                <node concept="3I6s7M" id="PORTCHCRMa" role="3I6sU7">
+                  <node concept="3Aqt3T" id="PORTCHCRM9" role="3I6s78">
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+                    <node concept="a7P8L" id="PORTCHCRMf" role="3AunhB">
+                      <ref role="a7OzE" node="PORTCHCRLK" resolve="L" />
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+                    <node concept="a7P8L" id="PORTCHCRMn" role="3AunhB">
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+              </node>
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+            <node concept="3Aq9E8" id="PORTCHCRMt" role="1nLNMd">
+              <node concept="3I6sU6" id="PORTCHCRMu" role="3Ip0Jz">
+                <node concept="3I6s7M" id="PORTCHMnzD" role="3I6sU7">
+                  <node concept="3wWvb2" id="PORTCHMnzB" role="3I6s78">
+                    <node concept="3clFbT" id="PORTCHMnzI" role="3wWo3s" />
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+                </node>
+                <node concept="3I6s7M" id="PORTCHCRMy" role="3I6sU7">
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+                  </node>
+                </node>
+              </node>
+            </node>
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+        </node>
+      </node>
+    </node>
+    <node concept="3AqmO8" id="1IKbs5Xw9SC" role="8PkJo">
+      <property role="TrG5h" value="tryRenameTypeVars" />
+      <node concept="1zAUYm" id="1IKbs5Xw9SD" role="1zAUyy">
+        <property role="TrG5h" value="toRename" />
+      </node>
+      <node concept="1zAUYm" id="1IKbs5Xw9SE" role="1zAUyy">
+        <property role="TrG5h" value="originalTypeVars" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="1IKbs5XihHK" role="8PkJo">
+      <property role="TrG5h" value="checkTypeVars" />
+      <node concept="1zAUYm" id="1IKbs5XihLJ" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+      <node concept="1zAUYm" id="1IKbs5XihHW" role="1zAUyy">
+        <property role="TrG5h" value="originalTypeVars" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="1IKbs5Xj1B1" role="8PkJo">
+      <property role="TrG5h" value="checkTypeVarsFail" />
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   <node concept="AVZre" id="48ZGLP8vr$a">
     <property role="TrG5h" value="annotation" />
     <ref role="2YbDB9" node="5dGkjBXlLmT" resolve="typeOf" />
@@ -8508,12 +9878,12 @@
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-                    </node>
-                    <node concept="a7P8L" id="48ZGLP8Y9DW" role="3AunhB">
+                    <node concept="a7P8L" id="1IKbs5XqMrX" role="3AunhB">
                       <ref role="a7OzE" node="48ZGLP8Y9om" resolve="Ann" />
                     </node>
+                    <node concept="a7P8L" id="1IKbs5XqMrK" role="3AunhB">
+                      <ref role="a7OzE" node="48ZGLP8XXD0" resolve="E" />
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                   </node>
                 </node>
                 <node concept="3I6s7M" id="48ZGLP8XXDc" role="3I6sU7">
@@ -8668,12 +10038,12 @@
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                   <node concept="3Aqt3T" id="PORTCHPpmr" role="3I6s78">
                     <ref role="3AqCNq" node="48ZGLP8pG4u" resolve="subsumed" />
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-                    </node>
-                    <node concept="a7P8L" id="PORTCHPpmJ" role="3AunhB">
+                    <node concept="a7P8L" id="1IKbs5XrdTp" role="3AunhB">
                       <ref role="a7OzE" node="PORTCHPplS" resolve="Ann" />
                     </node>
+                    <node concept="a7P8L" id="1IKbs5XrdTc" role="3AunhB">
+                      <ref role="a7OzE" node="JqEP$8fvE0" resolve="T" />
+                    </node>
                   </node>
                 </node>
                 <node concept="3I6s7M" id="JqEP$8fxKo" role="3I6sU7">
@@ -9042,1705 +10412,5 @@
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 </model>
 
diff --git a/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps b/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
index 376f1b77..504af8a3 100644
--- a/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
+++ b/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
@@ -1785,6 +1785,165 @@
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="1IKbs5XpTIz" role="1DVIru">
+      <node concept="1DVIrG" id="1IKbs5XpTI$" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5XpTI_" role="1DVIrJ">
+          <property role="TrG5h" value="r2_bad" />
+        </node>
+        <node concept="1DVIrH" id="1IKbs5XpTIA" role="1DVIrD">
+          <node concept="1DVIrG" id="1IKbs5XpTIH" role="1DVIrE">
+            <node concept="3TPQf" id="1IKbs5XpTII" role="1DVIrJ">
+              <node concept="1DVIoH" id="1IKbs5XpTIJ" role="3TPQ0">
+                <property role="TrG5h" value="r" />
+              </node>
+              <node concept="3JbUGG" id="1IKbs5XpTIK" role="3TPQk">
+                <node concept="2BbKIm" id="1IKbs5XpTIL" role="5lUUh">
+                  <property role="TrG5h" value="a" />
+                </node>
+                <node concept="1jz_ff" id="1IKbs5XpTIM" role="3JbKvY">
+                  <node concept="aFS0r" id="1IKbs5XpTIN" role="1jz_fp">
+                    <ref role="aFS0e" node="1IKbs5XpTIL" resolve="a" />
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+                  <node concept="aFS0r" id="1IKbs5XpTIO" role="1jz_f_">
+                    <ref role="aFS0e" node="1IKbs5XpTIL" resolve="a" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="1DVIrU" id="1IKbs5XpTIP" role="1DVIrD">
+              <node concept="1DVIrB" id="1IKbs5XpTIQ" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5XpTIR" role="1DVIrA">
+                  <property role="TrG5h" value="x" />
+                </node>
+              </node>
+              <node concept="3TPRf" id="1IKbs5XpTUi" role="1DVIrw">
+                <node concept="t0$VC" id="1IKbs5XpTUk" role="3TPR0">
+                  <ref role="t0$VJ" node="1IKbs5XpTIR" resolve="x" />
+                </node>
+                <node concept="3P8Jbz" id="1IKbs5XpTV$" role="3TPQk" />
+              </node>
+            </node>
+          </node>
+          <node concept="1DVIo5" id="1IKbs5XpTTY" role="1DVIrk">
+            <node concept="1DVIrU" id="1IKbs5XpTU8" role="1DVIo8">
+              <node concept="1DVIrB" id="1IKbs5XpTU9" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5XpTUa" role="1DVIrA">
+                  <property role="TrG5h" value="y" />
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+              </node>
+              <node concept="t0$VC" id="1IKbs5XpTUe" role="1DVIrw">
+                <ref role="t0$VJ" node="1IKbs5XpTUa" resolve="y" />
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+            </node>
+            <node concept="t0$VC" id="1IKbs5XpTTT" role="1DVIo4">
+              <ref role="t0$VJ" node="1IKbs5XpTII" resolve="r" />
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+        </node>
+      </node>
+    </node>
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+      <node concept="1DVIrG" id="1IKbs5XqmGL" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5XqmGM" role="1DVIrJ">
+          <property role="TrG5h" value="r3_bad" />
+        </node>
+        <node concept="1DVIrH" id="1IKbs5XqmGN" role="1DVIrD">
+          <node concept="1DVIo5" id="1IKbs5XqmGO" role="1DVIrk">
+            <node concept="1DVIrU" id="1IKbs5XqmGP" role="1DVIo8">
+              <node concept="1DVIrB" id="1IKbs5XqmGQ" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5XqmGR" role="1DVIrA">
+                  <property role="TrG5h" value="y" />
+                </node>
+              </node>
+              <node concept="t0$VC" id="1IKbs5XqmGS" role="1DVIrw">
+                <ref role="t0$VJ" node="1IKbs5XqmGR" resolve="y" />
+              </node>
+            </node>
+            <node concept="t0$VC" id="1IKbs5XqmGT" role="1DVIo4">
+              <ref role="t0$VJ" node="1IKbs5XqmGV" resolve="r" />
+            </node>
+          </node>
+          <node concept="1DVIrG" id="1IKbs5XqmGU" role="1DVIrE">
+            <node concept="3TPQf" id="1IKbs5XqmGV" role="1DVIrJ">
+              <node concept="1DVIoH" id="1IKbs5XqmGW" role="3TPQ0">
+                <property role="TrG5h" value="r" />
+              </node>
+              <node concept="1jz_ff" id="1IKbs5XqmSe" role="3TPQk">
+                <node concept="3P8Jbz" id="1IKbs5XqmSg" role="1jz_fp" />
+                <node concept="3P8Jbz" id="1IKbs5XqmSi" role="1jz_f_" />
+              </node>
+            </node>
+            <node concept="1DVIrU" id="1IKbs5XqmH2" role="1DVIrD">
+              <node concept="1DVIrB" id="1IKbs5XqmH3" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5XqmH4" role="1DVIrA">
+                  <property role="TrG5h" value="x" />
+                </node>
+              </node>
+              <node concept="t0$VC" id="1IKbs5XqmH5" role="1DVIrw">
+                <ref role="t0$VJ" node="1IKbs5XqmH4" resolve="x" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="1IKbs5X7385" role="1DVIru">
+      <node concept="1DVIrG" id="1IKbs5X7386" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5X7387" role="1DVIrJ">
+          <property role="TrG5h" value="r4_bad" />
+        </node>
+        <node concept="1DVIrH" id="1IKbs5X7388" role="1DVIrD">
+          <node concept="1DVIo5" id="1IKbs5X7389" role="1DVIrk">
+            <node concept="1DVIrU" id="1IKbs5X738a" role="1DVIo8">
+              <node concept="1DVIrB" id="1IKbs5X738b" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5X738c" role="1DVIrA">
+                  <property role="TrG5h" value="y" />
+                </node>
+              </node>
+              <node concept="t0$VC" id="1IKbs5X738d" role="1DVIrw">
+                <ref role="t0$VJ" node="1IKbs5X738c" resolve="y" />
+              </node>
+            </node>
+            <node concept="t0$VC" id="1IKbs5X738e" role="1DVIo4">
+              <ref role="t0$VJ" node="1IKbs5X738g" resolve="r" />
+            </node>
+          </node>
+          <node concept="1DVIrG" id="1IKbs5X738f" role="1DVIrE">
+            <node concept="3TPQf" id="1IKbs5X738g" role="1DVIrJ">
+              <node concept="1DVIoH" id="1IKbs5X738h" role="3TPQ0">
+                <property role="TrG5h" value="r" />
+              </node>
+              <node concept="3JbUGG" id="1IKbs5X738i" role="3TPQk">
+                <node concept="2BbKIm" id="1IKbs5X738j" role="5lUUh">
+                  <property role="TrG5h" value="a" />
+                </node>
+                <node concept="2BbKIm" id="1IKbs5X73fa" role="5lUUh">
+                  <property role="TrG5h" value="b" />
+                </node>
+                <node concept="1jz_ff" id="1IKbs5X738k" role="3JbKvY">
+                  <node concept="aFS0r" id="1IKbs5X738l" role="1jz_fp">
+                    <ref role="aFS0e" node="1IKbs5X738j" resolve="a" />
+                  </node>
+                  <node concept="aFS0r" id="1IKbs5X73ff" role="1jz_f_">
+                    <ref role="aFS0e" node="1IKbs5X73fa" resolve="b" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="1DVIrU" id="1IKbs5X738n" role="1DVIrD">
+              <node concept="1DVIrB" id="1IKbs5X738o" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5X738p" role="1DVIrA">
+                  <property role="TrG5h" value="x" />
+                </node>
+              </node>
+              <node concept="t0$VC" id="1IKbs5X738q" role="1DVIrw">
+                <ref role="t0$VJ" node="1IKbs5X738p" resolve="x" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
     <node concept="1DVJbV" id="JqEP$8sgn6" role="1DVIru">
       <node concept="1DVIrG" id="JqEP$8sgn7" role="j9CMd">
         <node concept="1DVIoH" id="JqEP$8sgn8" role="1DVIrJ">
@@ -2397,7 +2556,7 @@
                   <node concept="aFS0r" id="PORTCHVm9L" role="1jz_fp">
                     <ref role="aFS0e" node="PORTCHVm9y" resolve="b" />
                   </node>
-                  <node concept="aFS0r" id="PORTCHVm9O" role="1jz_f_">
+                  <node concept="aFS0r" id="1IKbs5X73g3" role="1jz_f_">
                     <ref role="aFS0e" node="PORTCHVm9y" resolve="b" />
                   </node>
                 </node>
@@ -2461,6 +2620,80 @@
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="1IKbs5X73jn" role="1DVIru">
+      <node concept="1DVIrG" id="1IKbs5X73jo" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5X73jp" role="1DVIrJ">
+          <property role="TrG5h" value="lb3_bad" />
+        </node>
+        <node concept="1DVIrH" id="1IKbs5X73jq" role="1DVIrD">
+          <node concept="1DVIo5" id="1IKbs5X73jr" role="1DVIrk">
+            <node concept="t0$VC" id="1IKbs5X73js" role="1DVIo4">
+              <ref role="t0$VJ" node="1IKbs5X73jC" resolve="f" />
+            </node>
+            <node concept="3TPRf" id="1IKbs5X73jt" role="1DVIo8">
+              <node concept="1DVIrU" id="1IKbs5X73jz" role="3TPR0">
+                <node concept="1DVIrB" id="1IKbs5X73j$" role="1DVIr_">
+                  <node concept="1DVIoH" id="1IKbs5X73j_" role="1DVIrA">
+                    <property role="TrG5h" value="x" />
+                  </node>
+                </node>
+                <node concept="t0$VC" id="1IKbs5X73jA" role="1DVIrw">
+                  <ref role="t0$VJ" node="1IKbs5X73j_" resolve="x" />
+                </node>
+              </node>
+              <node concept="1jz_ff" id="1IKbs5X73u2" role="3TPQk">
+                <node concept="3P8Jbz" id="1IKbs5Xe$dx" role="1jz_fp" />
+                <node concept="3P8Jbz" id="1IKbs5Xe$d$" role="1jz_f_" />
+              </node>
+            </node>
+          </node>
+          <node concept="1DVIrG" id="1IKbs5X73jB" role="1DVIrE">
+            <node concept="1DVIoH" id="1IKbs5X73jC" role="1DVIrJ">
+              <property role="TrG5h" value="f" />
+            </node>
+            <node concept="1DVIrU" id="1IKbs5X73jD" role="1DVIrD">
+              <node concept="1DVIrB" id="1IKbs5X73jE" role="1DVIr_">
+                <node concept="3TPQf" id="1IKbs5X73jF" role="1DVIrA">
+                  <node concept="1DVIoH" id="1IKbs5X73jG" role="3TPQ0">
+                    <property role="TrG5h" value="g" />
+                  </node>
+                  <node concept="3JbUGG" id="1IKbs5X73jH" role="3TPQk">
+                    <node concept="2BbKIm" id="1IKbs5X73jI" role="5lUUh">
+                      <property role="TrG5h" value="a" />
+                    </node>
+                    <node concept="1jz_ff" id="1IKbs5X73jJ" role="3JbKvY">
+                      <node concept="aFS0r" id="1IKbs5X73jK" role="1jz_fp">
+                        <ref role="aFS0e" node="1IKbs5X73jI" resolve="a" />
+                      </node>
+                      <node concept="aFS0r" id="1IKbs5X73jL" role="1jz_f_">
+                        <ref role="aFS0e" node="1IKbs5X73jI" resolve="a" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="3EUms" id="1IKbs5X73jM" role="1DVIrw">
+                <node concept="1DVIo5" id="1IKbs5X73jN" role="3EUmv">
+                  <node concept="3P8MHP" id="1IKbs5X73jO" role="1DVIo8" />
+                  <node concept="t0$VC" id="1IKbs5X73jP" role="1DVIo4">
+                    <ref role="t0$VJ" node="1IKbs5X73jF" resolve="g" />
+                  </node>
+                </node>
+                <node concept="1DVIo5" id="1IKbs5X73jQ" role="3EUmh">
+                  <node concept="3EUms" id="1IKbs5X73jR" role="1DVIo8">
+                    <node concept="3P8L2H" id="1IKbs5X73jS" role="3EUmv" />
+                    <node concept="3P8L2H" id="1IKbs5X73jT" role="3EUmh" />
+                  </node>
+                  <node concept="t0$VC" id="1IKbs5X73jU" role="1DVIo4">
+                    <ref role="t0$VJ" node="1IKbs5X73jF" resolve="g" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
     <node concept="1DVJbV" id="48ZGLP92Bm2" role="1DVIru">
       <node concept="1DVIrG" id="48ZGLP92Bm4" role="j9CMd">
         <node concept="1DVIoH" id="48ZGLP92Bm6" role="1DVIrJ">
@@ -2506,18 +2739,82 @@
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           </node>
           <node concept="1DVIo5" id="48ZGLP92Bsc" role="1DVIrw">
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-              <node concept="1DVIrB" id="48ZGLP92Bsn" role="1DVIr_">
-                <node concept="1DVIoH" id="48ZGLP92Bso" role="1DVIrA">
-                  <property role="TrG5h" value="x" />
+            <node concept="1DVIo5" id="1IKbs5Xm003" role="1DVIo4">
+              <node concept="t0$VC" id="48ZGLP92Bs7" role="1DVIo4">
+                <ref role="t0$VJ" node="48ZGLP92BqY" resolve="g" />
+              </node>
+              <node concept="1DVIrU" id="48ZGLP92Bsm" role="1DVIo8">
+                <node concept="1DVIrB" id="48ZGLP92Bsn" role="1DVIr_">
+                  <node concept="1DVIoH" id="48ZGLP92Bso" role="1DVIrA">
+                    <property role="TrG5h" value="x" />
+                  </node>
+                </node>
+                <node concept="t0$VC" id="48ZGLP92Bss" role="1DVIrw">
+                  <ref role="t0$VJ" node="48ZGLP92Bso" resolve="x" />
                 </node>
               </node>
-              <node concept="t0$VC" id="48ZGLP92Bss" role="1DVIrw">
-                <ref role="t0$VJ" node="48ZGLP92Bso" resolve="x" />
+            </node>
+            <node concept="3P8L2H" id="1IKbs5XlZZZ" role="1DVIo8" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="1IKbs5Xm05u" role="1DVIru">
+      <node concept="1DVIrG" id="1IKbs5Xm05v" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5Xm05w" role="1DVIrJ">
+          <property role="TrG5h" value="lb4_let" />
+        </node>
+        <node concept="1DVIrH" id="1IKbs5Xm0e$" role="1DVIrD">
+          <node concept="1DVIo5" id="1IKbs5Xm05L" role="1DVIrk">
+            <node concept="1DVIo5" id="1IKbs5Xm05M" role="1DVIo4">
+              <node concept="t0$VC" id="1IKbs5Xm0fg" role="1DVIo4">
+                <ref role="t0$VJ" node="1IKbs5Xm0eN" resolve="g" />
+              </node>
+              <node concept="1DVIrU" id="1IKbs5Xm05O" role="1DVIo8">
+                <node concept="1DVIrB" id="1IKbs5Xm05P" role="1DVIr_">
+                  <node concept="1DVIoH" id="1IKbs5Xm05Q" role="1DVIrA">
+                    <property role="TrG5h" value="x" />
+                  </node>
+                </node>
+                <node concept="t0$VC" id="1IKbs5Xm05R" role="1DVIrw">
+                  <ref role="t0$VJ" node="1IKbs5Xm05Q" resolve="x" />
+                </node>
               </node>
             </node>
-            <node concept="t0$VC" id="48ZGLP92Bs7" role="1DVIo4">
-              <ref role="t0$VJ" node="48ZGLP92BqY" resolve="g" />
+            <node concept="3P8L2H" id="1IKbs5Xm05S" role="1DVIo8" />
+          </node>
+          <node concept="1DVIrG" id="1IKbs5Xm0eM" role="1DVIrE">
+            <node concept="1DVIoH" id="1IKbs5Xm0eN" role="1DVIrJ">
+              <property role="TrG5h" value="g" />
+            </node>
+            <node concept="1DVIrU" id="1IKbs5Xm0eS" role="1DVIrD">
+              <node concept="1DVIrB" id="1IKbs5Xm0eT" role="1DVIr_">
+                <node concept="1DVIoH" id="1IKbs5Xm0eU" role="1DVIrA">
+                  <property role="TrG5h" value="a" />
+                </node>
+              </node>
+              <node concept="1DVIrU" id="1IKbs5Xm0eY" role="1DVIrw">
+                <node concept="1DVIrB" id="1IKbs5Xm0eZ" role="1DVIr_">
+                  <node concept="1DVIoH" id="1IKbs5Xm0f0" role="1DVIrA">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                </node>
+                <node concept="3EUms" id="1IKbs5Xm0f4" role="1DVIrw">
+                  <node concept="t0$VC" id="1IKbs5Xm0f6" role="3EUmv">
+                    <ref role="t0$VJ" node="1IKbs5Xm0f0" resolve="b" />
+                  </node>
+                  <node concept="1DVIrU" id="1IKbs5Xm0f8" role="3EUmh">
+                    <node concept="1DVIrB" id="1IKbs5Xm0f9" role="1DVIr_">
+                      <node concept="1DVIoH" id="1IKbs5Xm0fa" role="1DVIrA">
+                        <property role="TrG5h" value="b" />
+                      </node>
+                    </node>
+                    <node concept="t0$VC" id="1IKbs5Xm0fe" role="1DVIrw">
+                      <ref role="t0$VJ" node="1IKbs5Xm0eU" resolve="a" />
+                    </node>
+                  </node>
+                </node>
+              </node>
             </node>
           </node>
         </node>
@@ -2578,7 +2875,7 @@
         </node>
         <node concept="3TPQf" id="48ZGLP8LhRQ" role="1DVIrJ">
           <node concept="1DVIoH" id="48ZGLP8LhRS" role="3TPQ0">
-            <property role="TrG5h" value="qq_lb" />
+            <property role="TrG5h" value="qq_lb1" />
           </node>
           <node concept="3JbUGG" id="48ZGLP8LhRZ" role="3TPQk">
             <node concept="1jz_ff" id="48ZGLP8LhSf" role="3JbKvY">
@@ -2630,6 +2927,407 @@
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="1IKbs5XjM1N" role="1DVIru">
+      <node concept="1DVIrG" id="1IKbs5XjM1P" role="j9CMd">
+        <node concept="1DVIoH" id="1IKbs5XjM1R" role="1DVIrJ">
+          <property role="TrG5h" value="ff1" />
+        </node>
+        <node concept="1DVIrU" id="1IKbs5XjM9g" role="1DVIrD">
+          <node concept="1DVIrB" id="1IKbs5XjM9h" role="1DVIr_">
+            <node concept="3TPQf" id="1IKbs5XjMaU" role="1DVIrA">
+              <node concept="1DVIoH" id="1IKbs5XjMaW" role="3TPQ0">
+                <property role="TrG5h" value="p1" />
+              </node>
+              <node concept="3JbUGG" id="1IKbs5XjMb3" role="3TPQk">
+                <node concept="2BbKIm" id="1IKbs5XjMb5" role="5lUUh">
+                  <property role="TrG5h" value="a" />
+                </node>
+                <node concept="2BbKIm" id="1IKbs5XjMb7" role="5lUUh">
+                  <property role="TrG5h" value="b" />
+                </node>
+                <node concept="3EVAj" id="1IKbs5XjMba" role="3JbKvY">
+                  <node concept="aFS0r" id="1IKbs5XjMbc" role="3EVAk">
+                    <ref role="aFS0e" node="1IKbs5XjMb5" resolve="a" />
+                  </node>
+                  <node concept="aFS0r" id="1IKbs5XjMbe" role="3EVAi">
+                    <ref role="aFS0e" node="1IKbs5XjMb7" resolve="b" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3TPRf" id="1IKbs5XjMcX" role="1DVIrw">
+            <node concept="t0$VC" id="1IKbs5XjMcZ" role="3TPR0">
+              <ref role="t0$VJ" node="1IKbs5XjMaU" resolve="p1" />
+            </node>
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+                <property role="TrG5h" value="p1" />
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+                <property role="TrG5h" value="b" />
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+                </node>
+              </node>
+            </node>
+          </node>
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+            </node>
+            <node concept="3JbUGG" id="1IKbs5XjMp6" role="3TPQk">
+              <node concept="2BbKIm" id="1IKbs5XjMp8" role="5lUUh">
+                <property role="TrG5h" value="b" />
+              </node>
+              <node concept="3EVAj" id="1IKbs5XjMp9" role="3JbKvY">
+                <node concept="aFS0r" id="1IKbs5XjMxq" role="3EVAk">
+                  <ref role="aFS0e" node="1IKbs5XjMp8" resolve="b" />
+                </node>
+                <node concept="aFS0r" id="1IKbs5XjMpb" role="3EVAi">
+                  <ref role="aFS0e" node="1IKbs5XjMp8" resolve="b" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="1IKbs5Xm0yH" role="1DVIru">
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+          <node concept="1DVIrB" id="1IKbs5Xm0yK" role="1DVIr_">
+            <node concept="1DVIoH" id="1IKbs5Xm0yL" role="1DVIrA">
+              <property role="TrG5h" value="x" />
+            </node>
+          </node>
+          <node concept="1DVIrU" id="1IKbs5Xm0yM" role="1DVIrw">
+            <node concept="1DVIrB" id="1IKbs5Xm0yN" role="1DVIr_">
+              <node concept="3TPQf" id="1IKbs5Xm0yO" role="1DVIrA">
+                <node concept="1DVIoH" id="1IKbs5Xm0yP" role="3TPQ0">
+                  <property role="TrG5h" value="g" />
+                </node>
+                <node concept="3JbUGG" id="1IKbs5Xm0yQ" role="3TPQk">
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+                      </node>
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+                      </node>
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+                    </node>
+                  </node>
+                  <node concept="2BbKIm" id="1IKbs5Xm0yW" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3EUms" id="1IKbs5Xm0yX" role="1DVIrw">
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+                <node concept="3P8L2H" id="1IKbs5Xm0z0" role="1DVIo8" />
+                <node concept="3TPRf" id="1IKbs5XpM1O" role="1DVIo4">
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+                  </node>
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+                        <ref role="aFS0e" node="1IKbs5XpM1Y" resolve="c" />
+                      </node>
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+                        <node concept="aFS0r" id="1IKbs5XpTn3" role="3EVAi">
+                          <ref role="aFS0e" node="1IKbs5XpM1Y" resolve="c" />
+                        </node>
+                        <node concept="aFS0r" id="1IKbs5XpTrh" role="3EVAk">
+                          <ref role="aFS0e" node="1IKbs5Xm0zs" resolve="a" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="2BbKIm" id="1IKbs5XpM1Y" role="5lUUh">
+                      <property role="TrG5h" value="c" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1DVIo5" id="1IKbs5Xm0z1" role="3EUmh">
+                <node concept="t0$VC" id="1IKbs5Xm0z2" role="1DVIo4">
+                  <ref role="t0$VJ" node="1IKbs5Xm0yO" resolve="g" />
+                </node>
+                <node concept="3EUms" id="1IKbs5Xm0z3" role="1DVIo8">
+                  <node concept="3P8MHP" id="1IKbs5Xm0z4" role="3EUmv" />
+                  <node concept="3P8MHP" id="1IKbs5Xm0z5" role="3EUmh" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
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+          <node concept="1DVIoH" id="1IKbs5Xm0z7" role="3TPQ0">
+            <property role="TrG5h" value="qq_lb2" />
+          </node>
+          <node concept="3JbUGG" id="1IKbs5Xm0z8" role="3TPQk">
+            <node concept="1jz_ff" id="1IKbs5Xm0z9" role="3JbKvY">
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+              </node>
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+                <node concept="3EVAj" id="1IKbs5Xm0zc" role="1jz_f_">
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+                    <node concept="3P8Jbz" id="1IKbs5Xm0zf" role="3EVAi" />
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+                      <node concept="3P8Jbz" id="1IKbs5Xm0zk" role="3EVAi" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="3JbUGG" id="1IKbs5Xm0zl" role="1jz_fp">
+                  <node concept="2BbKIm" id="1IKbs5Xm0zm" role="5lUUh">
+                    <property role="TrG5h" value="b" />
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+                    <node concept="aFS0r" id="1IKbs5Xm0zo" role="1jz_fp">
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+                      </node>
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+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="2BbKIm" id="1IKbs5Xm0zs" role="5lUUh">
+              <property role="TrG5h" value="a" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="1IKbs5XpTx5" role="1DVIru">
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+            <node concept="1DVIoH" id="1IKbs5XpTx9" role="1DVIrA">
+              <property role="TrG5h" value="x" />
+            </node>
+          </node>
+          <node concept="1DVIrU" id="1IKbs5XpTxa" role="1DVIrw">
+            <node concept="1DVIrB" id="1IKbs5XpTxb" role="1DVIr_">
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+                <node concept="1DVIoH" id="1IKbs5XpTxd" role="3TPQ0">
+                  <property role="TrG5h" value="g" />
+                </node>
+                <node concept="3JbUGG" id="1IKbs5XpTxe" role="3TPQk">
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+                        <ref role="aFS0e" node="1IKbs5XpTxk" resolve="b" />
+                      </node>
+                      <node concept="aFS0r" id="1IKbs5XpTxi" role="3EVAk">
+                        <ref role="aFS0e" node="1IKbs5XpTxW" resolve="a" />
+                      </node>
+                    </node>
+                    <node concept="aFS0r" id="1IKbs5XpTxj" role="1jz_fp">
+                      <ref role="aFS0e" node="1IKbs5XpTxk" resolve="b" />
+                    </node>
+                  </node>
+                  <node concept="2BbKIm" id="1IKbs5XpTxk" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3EUms" id="1IKbs5XpTxl" role="1DVIrw">
+              <node concept="1DVIo5" id="1IKbs5XpTxm" role="3EUmv">
+                <node concept="3P8L2H" id="1IKbs5XpTxn" role="1DVIo8" />
+                <node concept="3TPRf" id="1IKbs5XpTxo" role="1DVIo4">
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+                    <ref role="t0$VJ" node="1IKbs5XpTxc" resolve="g" />
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+                  <node concept="3JbUGG" id="1IKbs5XpTxq" role="3TPQk">
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+                      <node concept="aFS0r" id="1IKbs5XpTxs" role="1jz_fp">
+                        <ref role="aFS0e" node="1IKbs5XpTxw" resolve="c" />
+                      </node>
+                      <node concept="3EVAj" id="1IKbs5XpTxt" role="1jz_f_">
+                        <node concept="aFS0r" id="1IKbs5XpTxu" role="3EVAi">
+                          <ref role="aFS0e" node="1IKbs5XpTxw" resolve="c" />
+                        </node>
+                        <node concept="aFS0r" id="1IKbs5XpTGs" role="3EVAk">
+                          <ref role="aFS0e" node="1IKbs5XpTxk" resolve="b" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="2BbKIm" id="1IKbs5XpTxw" role="5lUUh">
+                      <property role="TrG5h" value="c" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1DVIo5" id="1IKbs5XpTxx" role="3EUmh">
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+                  <ref role="t0$VJ" node="1IKbs5XpTxc" resolve="g" />
+                </node>
+                <node concept="3EUms" id="1IKbs5XpTxz" role="1DVIo8">
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+                  <node concept="3P8MHP" id="1IKbs5XpTx_" role="3EUmh" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3TPQf" id="1IKbs5XpTxA" role="1DVIrJ">
+          <node concept="1DVIoH" id="1IKbs5XpTxB" role="3TPQ0">
+            <property role="TrG5h" value="qq_lb2_bad" />
+          </node>
+          <node concept="3JbUGG" id="1IKbs5XpTxC" role="3TPQk">
+            <node concept="1jz_ff" id="1IKbs5XpTxD" role="3JbKvY">
+              <node concept="aFS0r" id="1IKbs5XpTxE" role="1jz_fp">
+                <ref role="aFS0e" node="1IKbs5XpTxW" resolve="a" />
+              </node>
+              <node concept="1jz_ff" id="1IKbs5XpTxF" role="1jz_f_">
+                <node concept="3EVAj" id="1IKbs5XpTxG" role="1jz_f_">
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+                    <node concept="aFS0r" id="1IKbs5XpTxI" role="3EVAk">
+                      <ref role="aFS0e" node="1IKbs5XpTxW" resolve="a" />
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+                    <node concept="3P8Jbz" id="1IKbs5XpTxJ" role="3EVAi" />
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+                  <node concept="3EVAj" id="1IKbs5XpTxK" role="3EVAi">
+                    <node concept="aFS0r" id="1IKbs5XpTxL" role="3EVAk">
+                      <ref role="aFS0e" node="1IKbs5XpTxW" resolve="a" />
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+                    <node concept="3EVAj" id="1IKbs5XpTxM" role="3EVAi">
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+                      <node concept="3P8Jbz" id="1IKbs5XpTxO" role="3EVAi" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="3JbUGG" id="1IKbs5XpTxP" role="1jz_fp">
+                  <node concept="2BbKIm" id="1IKbs5XpTxQ" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                  <node concept="1jz_ff" id="1IKbs5XpTxR" role="3JbKvY">
+                    <node concept="aFS0r" id="1IKbs5XpTxS" role="1jz_fp">
+                      <ref role="aFS0e" node="1IKbs5XpTxQ" resolve="b" />
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+                    <node concept="3EVAj" id="1IKbs5XpTxT" role="1jz_f_">
+                      <node concept="aFS0r" id="1IKbs5XpTxU" role="3EVAk">
+                        <ref role="aFS0e" node="1IKbs5XpTxW" resolve="a" />
+                      </node>
+                      <node concept="aFS0r" id="1IKbs5XpTxV" role="3EVAi">
+                        <ref role="aFS0e" node="1IKbs5XpTxQ" resolve="b" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="2BbKIm" id="1IKbs5XpTxW" role="5lUUh">
+              <property role="TrG5h" value="a" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
   </node>
 </model>