diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -113,3 +113,8 @@
 ## 0.11.0.1 -- 2020-03-16
 
 * Eleventh version revised A. Some documentation improvement of README.markdown file.
+
+## 0.11.1.0 -- 2020-03-16
+
+* Eleventh version revised B. Inserted the functionality of the second auxiliary executable O2help into the single one -- dobutokO2 with "0" first command
+line option. Changed the information in the README.markdown file appropriately.
diff --git a/DobutokO/Sound/Executable.hs b/DobutokO/Sound/Executable.hs
--- a/DobutokO/Sound/Executable.hs
+++ b/DobutokO/Sound/Executable.hs
@@ -40,7 +40,7 @@
       file = concat . drop 1 . take 2 $ arggs
       args = unwords . drop 2 $ arggs
   exist2 <- doesFileExist file
-  getBFst' (dobutokO2H exist2 args file, V.fromList . fmap (\(xs, f) -> (xs,f exist2 args file)) $ [("1",dobutokO2H1),("2",dobutokO2H2),
+  getBFst' (dobutokO2H exist2 args file, V.fromList . fmap (\(xs, f) -> (xs,f exist2 args file)) $ [("0",o2help),("1",dobutokO2H1),("2",dobutokO2H2),
     ("3",dobutokO2H3),("4",dobutokO2H4),("5",dobutokO2H5)]) arg1
 
 dobutokO2H1 :: Bool -> String -> FilePath -> IO ()
@@ -98,6 +98,15 @@
       dAmpl = read dAmpl0::Double
   uniqOberSoXSynthNGen4 file octave1 ampL time3 dAmpl args wws tts vs
 {-# INLINE dobutokO2H #-}
+
+-- | Takes textual input from the stdin and prints it as one 'String' to the stdout.
+o2help :: IO ()
+o2help = do
+  xs <- getContents
+  let ys = unwords . lines $ xs in do
+    putStrLn ""
+    putStrLn "-------------------------------------------------------------------------------------------------------------"
+    putStrLn ys
 
 ----------------------------------------------------------------------------------------------------------------------------------------------------
 
diff --git a/O2Help.hs b/O2Help.hs
deleted file mode 100644
--- a/O2Help.hs
+++ /dev/null
@@ -1,25 +0,0 @@
--- |
--- Module      :  O2Help
--- Copyright   :  (c) OleksandrZhabenko 2020
--- License     :  MIT
--- Stability   :  Experimental
--- Maintainer  :  olexandr543@yahoo.com
---
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text.
-
-{-# OPTIONS_GHC -threaded #-}
-
--- | The main function in the executable @O2help@. It converts its input (possibly multiline) to the output String and prints it to the stdout.
-main :: IO ()
-main = o2help
-
--- | Takes textual input from the stdin and prints it as one 'String' to the stdout.
-o2help :: IO ()
-o2help = do
-  xs <- getContents
-  let ys = unwords . lines $ xs in do
-    putStrLn ""
-    putStrLn "-------------------------------------------------------------------------------------------------------------"
-    putStrLn ys
-  
diff --git a/README.markdown b/README.markdown
--- a/README.markdown
+++ b/README.markdown
@@ -13,7 +13,7 @@
 
 For the executable you enter in the terminal:
 
-dobutokO2 { 1 | 2 | 3 | 4 | 5 | 6 } {fileName} {Ukrainian text}
+dobutokO2 { 0 | 1 | 2 | 3 | 4 | 5 | 6 } {fileName} {Ukrainian text}
 
   where filename is:
   the full name of the file to be recorded in the current directory or
@@ -32,6 +32,9 @@
     signs for the harmonics coefficients for obertones.
       
   In more detail:
+
+  "0" -> the program just converts multiline Ukrainian text from stdin
+     into a String and prints it to stdout. No other arguments are used.
 
   "1" -> basic functionality without the possibility to define individual obertones.
   
diff --git a/dobutokO2.cabal b/dobutokO2.cabal
--- a/dobutokO2.cabal
+++ b/dobutokO2.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dobutokO2
-version:             0.11.0.1
+version:             0.11.1.0
 synopsis:            A program and a library to create experimental music from a mono audio and a Ukrainian text
 description:         It can also create a timbre for the notes
 homepage:            https://hackage.haskell.org/package/dobutokO2
@@ -17,7 +17,7 @@
 cabal-version:       >=1.10
 
 library
-  exposed-modules:     Main, DobutokO.Sound, DobutokO.Sound.Functional, DobutokO.Sound.Executable, O2Help
+  exposed-modules:     Main, DobutokO.Sound, DobutokO.Sound.Functional, DobutokO.Sound.Executable
   -- other-modules:
   -- other-extensions:
   build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1, mmsyn6ukr >=0.6.3.1 && <1
@@ -30,14 +30,5 @@
   -- other-extensions:
   build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1, mmsyn6ukr >=0.6.3.1 && <1
   -- hs-source-dirs:
-  ghc-options:         -main-is Main
   default-language:    Haskell2010
 
-executable O2help
-  main-is:             O2Help.hs
-  -- other-modules:
-  -- other-extensions:
-  build-depends:       base >=4.7 && <4.14
-  -- hs-source-dirs:
-  ghc-options:         -main-is O2Help
-  default-language:    Haskell2010