diff --git a/B.wav b/B.wav
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diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -125,3 +125,7 @@
 
 * Sixth version revised F. Changed sound representations for the Ukrainian "б" -- file "B.wav", "д" -- file "E.wav", "дж" -- file "F.wav", 
 "ж" -- file "I.wav", "п" -- file "R.wav", "р" -- file "S.wav". Changed durations accordingly in the Map.txt file.
+
+## 0.6.6.0 -- 2020-05-12
+
+* Sixth version revised G. Changed sound representations for the Ukrainian "б" -- file "B.wav", "к" -- file "M.wav". 
diff --git a/M.wav b/M.wav
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diff --git a/mmsyn6ukr.cabal b/mmsyn6ukr.cabal
--- a/mmsyn6ukr.cabal
+++ b/mmsyn6ukr.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn6ukr
-version:             0.6.5.0
+version:             0.6.6.0
 synopsis:            A musical instrument synthesizer or a tool for Ukrainian language listening
 description:         A program can be used as a musical instrument synthesizer or for Ukrainian speech synthesis especially for poets and writers
 homepage:            https://hackage.haskell.org/package/mmsyn6ukr
@@ -10,7 +10,7 @@
 license-file:        LICENSE
 author:              OleksandrZhabenko
 maintainer:          olexandr543@yahoo.com
-copyright:           (c) OleksandrZhabenko 2019
+copyright:           (c) OleksandrZhabenko 2019-2020
 category:            Language
 build-type:          Simple
 extra-source-files:  ChangeLog.md, README.md, Map.txt