??? ?? ??, ?????? ??, ???? ???????????? ?????? ??? ???? ?????????? ????????????????, ?? ???????????????? ?~??- ?? ???? - ???? ???? - ?? - ?????- ???? - ???? - ?? ?????- ????If a grammatical principle that is definitely extra to ????is often a vowel ??and there's no other alternative other than a vowel ??then that grammatical principle can not be ex