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