?????????? ????? ?????? ??? ?????? ?????????????????????????????. ????????? ?? ?? ? ??? ???? ??? ????? ??? ???? ??? ??? ??? ? ????. ???? ?? ??? ??? ??? ? ???? ???? ????? ?????.If a grammatical principle that is added to ????is often a vowel ??and there is no other solution in addition to a vowel ??then that grammatical theor