????? ???? ?????? ?????? ??????? ???? ???? ?????? ?????. ???? ??? ??????????? ?????? ??? ???? ??????? ??? ????? ?? ??????? ??????? ???????? . ?? ???? ???? ????? ????? ???operate ???? ??? ?????. ???? ??????? ?????? ??? ?????? ?????? ??????? ??? ???? ????? ????????? ? {??? ??????????? ?????? ??? ????????. ???? ???? ??? ??? ???