 a b c@ generates string that includes character “a” if @a@ is
-- 'True', then optionally character “b” if @b@ is 'True', then character
-- “c” if @c@ is 'True'.

abcRow' :: Bool -> Bool -> Bool -> String
abcRow' a b c = abcRow (fromEnum a) (fromEnum b) (fromEnum c)

-- | @posErr pos s ms@ 
abcRow' :: Bool -> Bool -> Bool -> String
abcRow' a b c = abcRow (fromEnum a) (fromEnum b) (fromEnum c)
abcRow' a b c = abcRow (fromEnum a) (fromEnum b) (fromEnum c)