??? ??????? ???? ????? ???? ??????? ???? ????? ????? ???? ??????? ??????? ????? ?????? ??????? ??? ?????? ???????? ???? ?????? ???? ????? ???? ???? ???? ????????? ??? ????: ??? ? ?????? ????????? ??? ???? ???? ????? ?????????? ??? ???? ??? ???? ???? ???????? ????? ???? ????? ? ????? { ???????? ?????? ?????? ???? ???????? ??? ???? ? ?