???????????? ??????? ???????????? ??? ??????? ?? ?? ???? ???? ???? ???????? ?? ???? ???????????? ??·????? ???????????????? ?? ???????????? ?????????? ?? ???????? ?????????????? ?????? ?? ???????? ?? ?? ?? ?? ?? ?? ?? ??If a grammatical principle that's added to ????can be a vowel ??and there's no other selection besides a vowel ??then that gramma