??(??)?? ????????????, ???????????? ???? '?? ????'???? ??, ?? ?????????? ???????????????? ?????? ???? ????????.  ????? ???? ???? ???? ???? ???, ???? ???? ???? ???? ???? ???? ???? ???? ???? ???If a grammatical theory that is certainly additional to ????can be a vowel ??and there's no other option apart from a vowel ??then that grammatical theory c