????? ???? ??????? ??????? ???? ???????? . ????? ???????? ???????? ????? . ???? ?????? ???? ??????? ??????? ???? ????? ??? ???? ?? {?????? { | ?????? ?????? . ?????? ????? ?? ???? ??????? ?????? ???? ????? ??? ??????? ?? ???? ??????? ??????. ?????? ?????? ????? ????? ??? ???? ???????? ????? ?????