diff --git a/dictsource/ru_list b/dictsource/ru_list
index 367ebe9a..d8292558 100644
--- a/dictsource/ru_list
+++ b/dictsource/ru_list
@@ -289,3 +289,15 @@ _,      zVpit'aja
 // exceptions
 радио   r'ad;Io
 
+// letters (these are reduced to schwa when used as particles)
+_б      bE
+б       bE    $atend
+_в      vE
+в       vE    $atend
+_ж      ZE
+ж       ZE    $atend
+_к      kA
+к       kA    $atend
+_с      Es
+с       Es    $atend
+