?????? ??????????????????? ?? ??????? ???????? ??? ???????????? ???? ???? ????? ?????? ????????? ??- ???? ???? ?? ???? ?????? ???????? ?? ??? ?? ???????? ?? ????????(?? ?????????????? ??????????????)If a grammatical theory that is included to ????can be a vowel ??and there's no other solution aside from a vowel ??then that grammatical basic princip