?? ?? ??? ??? ?? ??? ? ???? ???? ??? ?? ???? ???? ??? ? ??????? ??? ????????????? ???????? ??????. ?????If a grammatical principle that is included to ????is really a vowel ??and there is no other solution apart from a vowel ??then that grammatical theory can not be included to ???????? ?? ?????????? ?? ?????? ?????????? ?? ?? ?? ???