???? ??? ??? ??????? ????? ????? ????? ???????? ???????? ?? ?????? ?????? ?? ?????? ?????? . ???? ?????? { ????? ????? ??? ?????? ????? { ?????? ????? ??? ??????. ?? ????? ??? ?????? ????? ????? ?????? ????? { ????? ????? ? ???????? ??? { ????? ?????? ?? ???? ???? . ????? ???? ??? ??????? ?????