Index: incubator/apertium-bel/apertium-bel.post-bel.dix
===================================================================
--- incubator/apertium-bel/apertium-bel.post-bel.dix	(revision 71471)
+++ incubator/apertium-bel/apertium-bel.post-bel.dix	(revision 71475)
@@ -6,29 +6,25 @@
     <sdef n="n" c="Noun"/>
   </sdefs>
 
-  <pardefs>
-    <pardef n="cns">
-      <e><i>н</i></e>
-    </pardef>
-  </pardefs>
-
   <section id="main" type="standard">
+    <!-- 
+      "~<WORD_END_WITH_VOWEL> ~у~<...>" → "<WORD_END_WITH_VOWEL> ў<...>"
+    -->
     <e>
-      <p>
-        <l><a/>у<a/></l>
-        <r>у<b/></r>
-      </p>
-    </e>
-    <!--  ~зорка ~у~ ~небе~
-           зорка  ў   небе  -->
-    <e>
       <p><l><a/></l><r></r></p>
-      <re>[абвгдеёжзиійклмнопрстуфхцчшщъыьэюя]+[аеіыиоу]</re>
+      <re>[абвгдеёжзійклмнопрстуўфхцчшыьэюя']+[ауеоыэяюі]</re>
       <p>
         <l><b/><a/>у<a/></l>
         <r><b/>ў<b/></r>
       </p>
     </e>
+    <!-- 
+      "~<WORD_END_WITH_VOWEL> <...>" → "<WORD_END_WITH_VOWEL> <...>"
+    -->
+    <e>
+      <p><l><a/></l><r></r></p>
+      <re>[абвгдеёжзійклмнопрстуўфхцчшыьэюя']+[ауеоыэяюі]</re>
+    </e>
   </section>
 </dictionary>
 
Index: incubator/apertium-bel/apertium-bel.bel.dix
===================================================================
--- incubator/apertium-bel/apertium-bel.bel.dix	(revision 71471)
+++ incubator/apertium-bel/apertium-bel.bel.dix	(revision 71475)
@@ -88323,7 +88323,7 @@
     <pardef n="у">
       <e r="LR"><p><l>у</l><r>у</r></p></e>
       <e r="LR"><p><l>ў</l><r>у</r></p></e>
-      <e r="RL"><p><l><a/>у</l><r>у</r></p></e>
+      <e r="RL"><p><l>у<a/></l><r>у</r></p></e>
     </pardef>
   </pardefs>
 
Index: incubator/apertium-bel-rus/apertium-bel-rus.rus-bel.t4x
===================================================================
--- incubator/apertium-bel-rus/apertium-bel-rus.rus-bel.t4x	(revision 71471)
+++ incubator/apertium-bel-rus/apertium-bel-rus.rus-bel.t4x	(revision 71475)
@@ -1,44 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <transfer>
   <section-def-cats>
-    <def-cat n="prep">
-      <cat-item tags="pr"/>
-    </def-cat>
     <def-cat n="default">
       <cat-item tags="*"/>
     </def-cat>
   </section-def-cats>
 
-  <section-def-attrs>
-    <def-attr n="a_cas">
-      <attr-item tags="nom"/>
-    </def-attr>
-  </section-def-attrs>
-
   <section-def-vars>
     <def-var n="alarm" v="~"/>
   </section-def-vars>
 
-  <section-def-macros>
-    <def-macro n="test" npar="1">
-          <let>
-            <var n="alarm"/>
-            <lit v="~"/>
-          </let>
-    </def-macro>
-  </section-def-macros>
-
   <section-rules>
-    <rule comment="REGLA: PREP">
-      <pattern>
-        <pattern-item n="prep"/>
-      </pattern>
-      <action>
-        <out>
-          <lu><clip pos="1" side="tl" part="whole"/></lu>
-        </out>
-      </action>
-    </rule>
 
     <rule comment="REGLA: DEFAULT">
       <pattern>