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