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