diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,3 +8,7 @@
 
 * First version revised A. Added a function show7s2 for the usage in the mmsyn7ukr package.
 
+## 0.2.0.0 -- 2020-02-24
+
+* Second version. Added functions that can be used to divide a given text to parts with the unique Ukrainian sounds representations (except silent ones) and
+the rest of the text being represented. Changed code for mmsyn7s function for readability. Some minor documentation improvements.
diff --git a/MMSyn7s.hs b/MMSyn7s.hs
--- a/MMSyn7s.hs
+++ b/MMSyn7s.hs
@@ -2,33 +2,63 @@
 -- Module      :  MMSyn7s
 -- Copyright   :  (c) OleksandrZhabenko 2020
 -- License     :  MIT
---
 -- Maintainer  :  olexandr543@yahoo.com
 --
 -- A program and a library that show a sorted list of the Ukrainian sounds 
--- representations that can be used by mmsyn7 series of programs
+-- representations that can be used by mmsyn7 series of programs.
 --
 
-module MMSyn7s where
+module MMSyn7s (
+  -- * Used in the program
+  main7s
+  -- * Library functions
+  -- ** For the text as a whole object
+  , show7s
+  , show7s2
+  -- ** For the text being treated as partial one
+  , show7s'
+  , show7s3
+  -- *** Inner predicate (auxiliary)
+  , eqSnds
+) where
 
 import qualified Data.Vector as V
-import Data.List (sort, nub)
+import Data.List (sort, nub,(\\),nubBy)
 import Melodics.Ukrainian (convertToProperUkrainian)
 import System.Environment (getArgs)
 
-
 -- | Function takes Ukrainian text being written without quotes as command line arguments and prints the sorted list of the Ukrainian sounds representations 
 -- that can be used further in mmsyn7 series of programs.
 main7s :: IO ()
 main7s = do 
   texts <- getArgs
   putStrLn ""
-  putStrLn . show . sort . nub . V.toList . V.filter (\x -> x /= "-" && x /= "1" && x /= "0") . convertToProperUkrainian . unwords $ texts
+  putStrLn . show7s2 . unwords $ texts
 
--- | Function takes Ukrainian text being a @String@ and returns a sorted list of the Ukrainian sounds representations that can be used further in mmsyn7 series of programs.
+-- | Function takes Ukrainian text being a @String@ and returns a sorted list of the Ukrainian sounds representations that can be used further in mmsyn7 series of
+-- programs.
 show7s :: String -> [String]
 show7s xs = sort . nub . V.toList . V.filter (\x -> x /= "-" && x /= "1" && x /= "0") . convertToProperUkrainian $ xs
   
--- | Function takes Ukrainian text being a @String@ and returns a @String@ that is shown sorted list of the Ukrainian sounds representations that can be used further in mmsyn7 series of programs.
+-- | Function takes Ukrainian text being a @String@ and returns a @String@ that shows a sorted list of the Ukrainian sounds representations that can be used further
+-- in mmsyn7 series of programs.
 show7s2 :: String -> String
 show7s2 xs = show . sort . nub . V.toList . V.filter (\x -> x /= "-" && x /= "1" && x /= "0") . convertToProperUkrainian $ xs
+
+-- | Function 'show7s3' takes Ukrainian text being a @String@ and returns a tuple, the first element of which is a list of Strings that correspond to the Ukrainian 
+-- sounds representations that (except pauses) are unique and are not repeated starting from the beginning of the given text, and the second one is a remainder
+-- list of Strings starting from the first duplicated non-silent Ukrainian sound representation.
+show7s3 :: String -> ([String], [String])
+show7s3 xs = show7s' . V.toList . convertToProperUkrainian $ xs
+
+-- | Function 'eqSnds' compares two non-silent Strings representations for Ukranianian sounds by equality. If one of them is a representation for silence (e. g. pause),
+-- then the predicate is @False@.
+eqSnds :: String -> String -> Bool
+eqSnds xs ys | xs `elem` ["-","0","1"] || ys `elem` ["-","0","1"] = False
+             | otherwise = xs == ys
+
+-- | Function @show7s'@ is auxiliary to the 'show7s3' and is used internally in the latter one.
+show7s' :: [String] -> ([String],[String])
+show7s' zss = let (xss, yss) = splitAt 68 zss in 
+  let uss = xss \\ (nubBy eqSnds xss) in let (wss,vss) = if null uss then (xss,[]) else (takeWhile (/= head uss) xss ++ head uss:(takeWhile (/= head uss) . tail . dropWhile (/= head uss) $ xss), dropWhile (/= head uss) . tail . dropWhile (/= head uss) $ xss) in
+    (wss,vss ++ yss)
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -2,11 +2,10 @@
 -- Module      :  MMSyn7s
 -- Copyright   :  (c) OleksandrZhabenko 2020
 -- License     :  MIT
---
 -- Maintainer  :  olexandr543@yahoo.com
 --
 -- A program and a library that show a sorted list of the Ukrainian sounds 
--- representations that can be used by mmsyn7 series of programs
+-- representations that can be used by mmsyn7 series of programs.
 --
 
 module Main where
@@ -15,10 +14,9 @@
 
 -- | The main function used in the executable @mmsyn7s@.
 main :: IO ()
-main = do 
+main = do
   putStrLn "You could specify the Ukrainian text now as the command line arguments by simply adding the Ukrainian text without initial quotes as a command line arguments! "
   putStrLn ""
   putStrLn "Now the program will output the list of Ukrainian sounds representations used by the mmsyn6ukr and mmsyn7 programs. "
   putStrLn ""
   main7s
-  
diff --git a/mmsyn7s.cabal b/mmsyn7s.cabal
--- a/mmsyn7s.cabal
+++ b/mmsyn7s.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn7s
-version:             0.1.1.0
+version:             0.2.0.0
 synopsis:            Shows a sorted list of the Ukrainian sounds representations that can be used by mmsyn7 series of programs
 description:         A program and a library that show a sorted list of the Ukrainian sounds representations that can be used by mmsyn7 series of programs
 homepage:            https://hackage.haskell.org/package/mmsyn7s