?? ???? ???????? ?????? ????????? ?? ??????.?? ??? ????????????? ???????? ??????. ????????????? ?????????????? ?????? ???? ???????? ???????????? ?????? ????()?? ?? ????      ????.If a grammatical basic principle that's extra to ????is a vowel ??and there is no other choice aside from a vowel ??then that grammatical theory can't be extra to ??