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