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