Tell me how you can combine into one string and can it be done using grep\\sed.
1 a text file of strings in this format
Stroka, cheslea, number, number
Strokab, cheslea, number, number
Number, number, Strokab, cislab
Number, number, Stroka, cislab
It is necessary to bring to mind:
Stroka, cheslea, cislab
Strokab, cheslea, cislab