diff --git a/Aftovolio/Basis.hs b/Aftovolio/Basis.hs
--- a/Aftovolio/Basis.hs
+++ b/Aftovolio/Basis.hs
@@ -1,9 +1,9 @@
 {-# OPTIONS_HADDOCK show-extensions #-}
-{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude, StrictData #-}
 
 -- |
 -- Module      :  Aftovolio.Basis
--- Copyright   :  (c) OleksandrZhabenko 2020-2023
+-- Copyright   :  (c) OleksandrZhabenko 2020-2024
 -- License     :  MIT
 -- Stability   :  Experimental
 -- Maintainer  :  oleksandr.zhabenko@yahoo.com
diff --git a/Aftovolio/Coeffs.hs b/Aftovolio/Coeffs.hs
--- a/Aftovolio/Coeffs.hs
+++ b/Aftovolio/Coeffs.hs
@@ -1,9 +1,9 @@
 {-# OPTIONS_HADDOCK show-extensions #-}
-{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude, StrictData #-}
 
 -- |
 -- Module      :  Aftovolio.Coeffs
--- Copyright   :  (c) OleksandrZhabenko 2020-2023
+-- Copyright   :  (c) OleksandrZhabenko 2020-2024
 -- License     :  MIT
 -- Stability   :  Experimental
 -- Maintainer  :  oleksandr.zhabenko@yahoo.com
diff --git a/Aftovolio/ConstraintsEncoded.hs b/Aftovolio/ConstraintsEncoded.hs
--- a/Aftovolio/ConstraintsEncoded.hs
+++ b/Aftovolio/ConstraintsEncoded.hs
@@ -1,8 +1,5 @@
 {-# OPTIONS_HADDOCK show-extensions #-}
 
-
-
-
 -- |
 -- Module      :  Aftovolio.ConstraintsEncoded
 -- Copyright   :  (c) OleksandrZhabenko 2020-2024
@@ -13,7 +10,7 @@
 -- Provides a way to encode the needed constraint with possibly less symbols.
 -- Uses arrays instead of vectors.
 
-{-# LANGUAGE FlexibleInstances, FlexibleContexts, NoImplicitPrelude, BangPatterns #-}
+{-# LANGUAGE FlexibleInstances, FlexibleContexts, NoImplicitPrelude, BangPatterns, StrictData #-}
 
 module Aftovolio.ConstraintsEncoded (
   -- * Data types
diff --git a/Aftovolio/General/Base.hs b/Aftovolio/General/Base.hs
--- a/Aftovolio/General/Base.hs
+++ b/Aftovolio/General/Base.hs
@@ -2,7 +2,7 @@
 {-# OPTIONS_GHC -funbox-strict-fields -fobject-code #-}
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE NoImplicitPrelude #-}
-{-# LANGUAGE UnboxedTuples #-}
+{-# LANGUAGE UnboxedTuples, StrictData #-}
 {-# LANGUAGE MagicHash #-}
 
 -- |
diff --git a/Aftovolio/General/Datatype3.hs b/Aftovolio/General/Datatype3.hs
--- a/Aftovolio/General/Datatype3.hs
+++ b/Aftovolio/General/Datatype3.hs
@@ -6,7 +6,7 @@
 -- Maintainer  :  oleksandr.zhabenko@yahoo.com
 
 {-# OPTIONS_GHC -funbox-strict-fields #-}
-{-# LANGUAGE NoImplicitPrelude, BangPatterns #-}
+{-# LANGUAGE NoImplicitPrelude, BangPatterns, StrictData #-}
 
 module Aftovolio.General.Datatype3 (
    Read0
@@ -28,7 +28,7 @@
 import GHC.Word
 import GHC.Real (floor,fromIntegral,(/)) 
 import GHC.Float (int2Double) 
-import Data.List (groupBy,find)
+import Data.List (groupBy,find,maximumBy,minimumBy)
 import Data.Char (isDigit, isSpace,isLetter)
 import Text.Read (readMaybe)
 import Text.Show (Show(..))
@@ -37,6 +37,7 @@
 import Data.Tuple (fst,snd)
 import qualified Data.Foldable as F (foldr) 
 import qualified Data.Sequence as S
+import Data.Ord (comparing) 
 import ListQuantizer (round2GL) 
 
 -- | Is a way to read duration of the additional added time period into the line.
@@ -194,14 +195,12 @@
 showRead0AsInsert d@(C ts) = ts
 {-# INLINE showRead0AsInsert #-}
 
--- | Is intended to be used to transform the earlier data for AFTOVolio representations durations from 'Double' to 'Word8' values. It was used during the transition from the ukrainian-phonetics-basic-array-0.7.1.1 to ukrainian-phonetics-basic-array-0.10.0.0.
+-- | Is intended to be used to transform the earlier data for AFTOVolio representations durations from 'Double' to 'Word8' values. It was used during the transition from the ukrainian-phonetics-basic-array-0.7.1.1 to ukrainian-phonetics-basic-array-0.10.0.0. 
 zippedDouble2Word8 xs = map (\(t, u) -> (t,fromMaybe 15 . hh $ u)) xs 
-  where !h = snd . head $ xs
-        !lt = snd . last $ xs
+  where !h = snd . minimumBy (comparing snd) $ xs
+        !lt = snd . maximumBy (comparing snd) $ xs
         !del = (lt - h)/14.0
         !ys  = take 15 . iterate (+del) $ h
         !zs = zip [1..15] ys
         gg !u = fromMaybe lt . round2GL True (\_ _ -> EQ) ys $ u
         hh !u = fmap fst . find ((== gg u) . snd) $ zs
-
-
diff --git a/Aftovolio/General/Simple.hs b/Aftovolio/General/Simple.hs
--- a/Aftovolio/General/Simple.hs
+++ b/Aftovolio/General/Simple.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE NoImplicitPrelude, BangPatterns, DeriveGeneric #-}
+{-# LANGUAGE NoImplicitPrelude, BangPatterns, DeriveGeneric, StrictData #-}
 
 module Aftovolio.General.Simple where
 
diff --git a/Aftovolio/General/Syllables.hs b/Aftovolio/General/Syllables.hs
--- a/Aftovolio/General/Syllables.hs
+++ b/Aftovolio/General/Syllables.hs
@@ -2,7 +2,7 @@
 {-# OPTIONS_GHC -funbox-strict-fields -fobject-code #-}
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
-{-# LANGUAGE UnboxedTuples #-}
+{-# LANGUAGE UnboxedTuples, StrictData #-}
 {-# LANGUAGE MagicHash #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE NoImplicitPrelude #-}
diff --git a/Aftovolio/PermutationsRepresent.hs b/Aftovolio/PermutationsRepresent.hs
--- a/Aftovolio/PermutationsRepresent.hs
+++ b/Aftovolio/PermutationsRepresent.hs
@@ -1,8 +1,8 @@
-{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude, StrictData #-}
 
 -- |
 -- Module      :  Aftovolio.PermutationsRepresent
--- Copyright   :  (c) OleksandrZhabenko 2022-2023
+-- Copyright   :  (c) OleksandrZhabenko 2022-2024
 -- License     :  MIT
 -- Stability   :  Experimental
 -- Maintainer  :  oleksandr.zhabenko@yahoo.com
diff --git a/Aftovolio/RGLPK/General.hs b/Aftovolio/RGLPK/General.hs
--- a/Aftovolio/RGLPK/General.hs
+++ b/Aftovolio/RGLPK/General.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude, StrictData #-}
 {-# OPTIONS_HADDOCK show-extensions #-}
 
 -- |
diff --git a/Aftovolio/Ukrainian/Common2.hs b/Aftovolio/Ukrainian/Common2.hs
--- a/Aftovolio/Ukrainian/Common2.hs
+++ b/Aftovolio/Ukrainian/Common2.hs
@@ -1,5 +1,5 @@
 {-# OPTIONS_HADDOCK show-extensions #-}
-{-# LANGUAGE BangPatterns, NoImplicitPrelude #-}
+{-# LANGUAGE BangPatterns, NoImplicitPrelude, StrictData #-}
 
 -- |
 -- Module      :  Aftovolio.Ukrainian.Common2
diff --git a/Aftovolio/Ukrainian/IO.hs b/Aftovolio/Ukrainian/IO.hs
--- a/Aftovolio/Ukrainian/IO.hs
+++ b/Aftovolio/Ukrainian/IO.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE NoImplicitPrelude, ScopedTypeVariables, DeriveGeneric #-}
+{-# LANGUAGE NoImplicitPrelude, ScopedTypeVariables, DeriveGeneric, StrictData #-}
 
 module Aftovolio.Ukrainian.IO where
 
diff --git a/Aftovolio/Ukrainian/SyllableWord8.hs b/Aftovolio/Ukrainian/SyllableWord8.hs
--- a/Aftovolio/Ukrainian/SyllableWord8.hs
+++ b/Aftovolio/Ukrainian/SyllableWord8.hs
@@ -23,12 +23,12 @@
 import GHC.Word
 
 s0DuratD1 :: Sound8 -> Word8
-s0DuratD1 = getBFstLSorted' 5 [(1,15),(2,10),(3,13),(4,12),(5,11),(6,10),(7,1),(8,6),(9,6),(10,7),(11,7),(15,6),(16,6),(17,8),(18,8),(19,7),(20,7),(21,8),(22,8),(23,5),(24,5),(25,6),(26,6),(27,6),(28,7),(29,7),(30,8),(31,8),(32,8),(33,8),(34,5),(35,5),(36,9),(37,9),(38,5),(39,6),(40,6),(41,7),(42,7),(43,6),(44,6),(45,4),(46,4),(47,15),(48,15),(49,8),(50,12),(51,12),(52,8),(53,8),(54,8),(66,10)]
+s0DuratD1 = getBFstLSorted' 5 [(1,15),(2,10),(3,13),(4,12),(5,11),(6,10),(7,1),(8,6),(9,6),(10,7),(11,7),(15,6),(16,6),(17,8),(18,8),(19,7),(20,7),(21,8),(22,8),(23,5),(24,5),(25,6),(26,6),(27,6),(28,7),(29,7),(30,8),(31,8),(32,8),(33,8),(34,5),(35,5),(36,9),(37,9),(38,5),(39,6),(40,6),(41,7),(42,7),(43,6),(44,6),(45,4),(46,4),(47,15),(48,15),(49,8),(50,12),(51,12),(52,8),(53,8),(54,8),(66,10)] 
 {-# INLINE s0DuratD1 #-}
 
 -- |
 s0DuratD2 :: Sound8 -> Word8
-s0DuratD2 = getBFstLSorted' 5 [(1,15),(2,15),(3,15),(4,14),(5,11),(6,11),(7,1),(8,4),(9,4),(10,5),(11,5),(15,6),(16,6),(17,4),(18,4),(19,4),(20,4),(21,3),(22,3),(23,5),(24,5),(25,4),(26,4),(27,5),(28,6),(29,6),(30,8),(31,8),(32,3),(33,3),(34,4),(35,4),(36,5),(37,5),(38,3),(39,7),(40,7),(41,7),(42,7),(43,9),(44,9),(45,3),(46,3),(47,5),(48,5),(49,3),(50,3),(51,3),(52,5),(53,5),(54,4),(66,4)] 
+s0DuratD2 = getBFstLSorted' 5 [(1,15),(2,15),(3,15),(4,14),(5,11),(6,11),(7,1),(8,4),(9,4),(10,5),(11,5),(15,6),(16,6),(17,4),(18,4),(19,4),(20,4),(21,3),(22,3),(23,5),(24,5),(25,4),(26,4),(27,5),(28,6),(29,6),(30,8),(31,8),(32,3),(33,3),(34,4),(35,4),(36,5),(37,5),(38,3),(39,7),(40,7),(41,7),(42,7),(43,9),(44,9),(45,3),(46,3),(47,5),(48,5),(49,3),(50,3),(51,3),(52,5),(53,5),(54,4),(66,4)]
 {-# INLINE s0DuratD2 #-}
 
 s0DuratD3 :: Sound8 -> Word8
@@ -38,17 +38,6 @@
 s0DuratD4 :: Sound8 -> Word8
 s0DuratD4 = getBFstLSorted' 5 [(1,12),(2,12),(3,12),(4,12),(5,12),(6,12),(7,1),(8,5),(9,5),(10,10),(11,10),(15,5),(16,5),(17,8),(18,8),(19,8),(20,8),(21,13),(22,13),(23,10),(24,10),(25,5),(26,5),(27,4),(28,10),(29,10),(30,15),(31,15),(32,8),(33,8),(34,4),(35,4),(36,6),(37,6),(38,4),(39,12),(40,12),(41,14),(42,14),(43,11),(44,11),(45,6),(46,6),(47,4),(48,4),(49,6),(50,11),(51,11),(52,15),(53,15),(54,7),(66,5)]
 {-# INLINE s0DuratD4 #-}
-
-{-
-help1 xs = map (\(t, u) -> (t,fromMaybe 15 . hh $ u)) xs 
-  where !h = snd . head $ xs
-        !lt = snd . last $ xs
-        !del = (lt - h)/14.0
-        !ys  = take 15 . iterate (+del) $ h
-        !zs = zip [1..15] ys
-        gg !u = fromMaybe lt . round2GL True (\_ _ -> EQ) ys $ u
-        hh !u = fmap fst . find ((== gg u) . snd) $ zs
--}
 
 class (Eq a) => SyllableDurations4 a where
   sDuratsD :: a -> Word8
diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,3 +8,7 @@
 
 * Second version. Added possibility to specify sequence of Word8 numbers as durations to  be compared with in the +ln ... -ln command line arguments group.
 
+##  0.2.1.0 -- 2024-09-28
+
+* Second version revised A. Updated dependencies. Some minor code usability improvements.
+ 
diff --git a/aftovolio.cabal b/aftovolio.cabal
--- a/aftovolio.cabal
+++ b/aftovolio.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               aftovolio
-version:            0.2.0.0
+version:            0.2.1.0
 
 -- A short (one-line) description of the package.
 synopsis:           An AFTOVolio implementation for creating texts with special phonetic / prosodic properties.
@@ -27,8 +27,8 @@
     exposed-modules:  Aftovolio.Ukrainian.Common2, Aftovolio.Ukrainian.IO, Aftovolio.Ukrainian.PrepareText, Aftovolio.Ukrainian.ReverseConcatenations, Aftovolio.DataG, Aftovolio.StrictVG, Aftovolio.Partir, Data.ChooseLine2, Aftovolio.PermutationsArr, Aftovolio.PermutationsArrMini, Aftovolio.PermutationsArrMini1, Aftovolio.PermutationsRepresent, Aftovolio.Constraints, Aftovolio.ConstraintsEncoded, Aftovolio.Tests, Aftovolio.Ukrainian.Syllable, Aftovolio.Ukrainian.Melodics, Aftovolio.Ukrainian.SyllableWord8, Aftovolio.Basis, Aftovolio.UniquenessPeriodsG, Aftovolio.Coeffs, Aftovolio.Ukrainian.ReadDurations, Aftovolio.General.Datatype3, Aftovolio.General.Distance, Aftovolio.Halfsplit, Aftovolio.General.Parsing, Aftovolio.General.Base, Aftovolio.General.PrepareText, Aftovolio.General.Simple, Aftovolio.General.SpecificationsRead, Aftovolio.General.Syllables, Aftovolio.RGLPK.General 
 
     -- LANGUAGE extensions used by modules in this package.
-    other-extensions: NoImplicitPrelude, BangPatterns, DeriveGeneric
-    build-depends:    base >=4.13 && <5, rhythmic-sequences ==0.8.0.0, cli-arguments ==0.7.0.0, directory >=1.3.4.0 && <2, rev-scientific ==0.2.1.0, async >= 2.2.2 && <3, mmsyn2-array ==0.3.1.1, minmax ==0.1.1.0, deepseq >=1.4.4.0 && <2, monoid-insertleft ==0.1.0.1, intermediate-structures ==0.1.1.0, quantizer ==0.3.1.0, containers >=0.5.11.0 && <1, lists-flines == 0.1.3.0
+    other-extensions: NoImplicitPrelude, BangPatterns, DeriveGeneric, StrictData
+    build-depends:    base >=4.13 && <5, rhythmic-sequences ==0.8.0.0, cli-arguments ==0.7.0.0, directory >=1.3.4.0 && <2, rev-scientific ==0.2.1.0, async >= 2.2.2 && <3, mmsyn2-array ==0.3.1.1, minmax ==0.1.1.0, deepseq >=1.4.4.0 && <2, monoid-insertleft ==0.1.0.1, intermediate-structures ==0.1.2.0, quantizer ==0.4.0.0, containers >=0.5.11.0 && <1, lists-flines == 0.1.3.0
     hs-source-dirs:   .
     default-language: Haskell2010
 
@@ -39,16 +39,16 @@
     other-modules:    Aftovolio.Ukrainian.Common2, Aftovolio.Ukrainian.IO, Aftovolio.Ukrainian.PrepareText, Aftovolio.Ukrainian.ReverseConcatenations, Aftovolio.DataG, Aftovolio.StrictVG, Aftovolio.Partir, Data.ChooseLine2, Aftovolio.PermutationsArr, Aftovolio.PermutationsArrMini, Aftovolio.PermutationsArrMini1, Aftovolio.PermutationsRepresent, Aftovolio.Constraints, Aftovolio.ConstraintsEncoded, Aftovolio.Tests, Aftovolio.Ukrainian.Syllable, Aftovolio.Ukrainian.Melodics, Aftovolio.Ukrainian.SyllableWord8, Aftovolio.Basis, Aftovolio.UniquenessPeriodsG, Aftovolio.Coeffs, Aftovolio.Ukrainian.ReadDurations, Aftovolio.General.Datatype3, Aftovolio.General.Distance, Aftovolio.Halfsplit, Aftovolio.General.Parsing, Aftovolio.General.Base, Aftovolio.General.PrepareText, Aftovolio.General.Simple, Aftovolio.General.SpecificationsRead, Aftovolio.General.Syllables, Aftovolio.RGLPK.General
     ghc-options:      -threaded -rtsopts
     -- LANGUAGE extensions used by modules in this package.
-    other-extensions: NoImplicitPrelude, BangPatterns, DeriveGeneric
-    build-depends:    base >=4.13 && <5, rhythmic-sequences ==0.8.0.0, cli-arguments ==0.7.0.0, directory >=1.3.4.0 && <2, rev-scientific ==0.2.1.0, async >= 2.2.2 && <3, mmsyn2-array ==0.3.1.1, minmax ==0.1.1.0, deepseq >=1.4.4.0 && <2, monoid-insertleft ==0.1.0.1, intermediate-structures ==0.1.1.0, quantizer ==0.3.1.0, containers >=0.5.11.0 && <1, lists-flines == 0.1.3.0 
+    other-extensions: NoImplicitPrelude, BangPatterns, DeriveGeneric, StrictData
+    build-depends:    base >=4.13 && <5, rhythmic-sequences ==0.8.0.0, cli-arguments ==0.7.0.0, directory >=1.3.4.0 && <2, rev-scientific ==0.2.1.0, async >= 2.2.2 && <3, mmsyn2-array ==0.3.1.1, minmax ==0.1.1.0, deepseq >=1.4.4.0 && <2, monoid-insertleft ==0.1.0.1, intermediate-structures ==0.1.2.0, quantizer ==0.4.0.0, containers >=0.5.11.0 && <1, lists-flines == 0.1.3.0 
     hs-source-dirs:   src, .
     default-language: Haskell2010
 
 executable unconcatUkr2
   main-is:             Main.hs
   other-modules:       Aftovolio.Ukrainian.ReverseConcatenations
-  other-extensions:    BangPatterns, NoImplicitPrelude
-  build-depends:       base >=4.13 && <5, mmsyn2-array ==0.3.1.1, intermediate-structures == 0.1.1.0
+  other-extensions:    BangPatterns, NoImplicitPrelude, StrictData
+  build-depends:       base >=4.13 && <5, mmsyn2-array ==0.3.1.1, intermediate-structures == 0.1.2.0
   ghc-options:         -threaded -rtsopts
   hs-source-dirs:      .
   default-language:    Haskell2010
