????? ?? ??? ????? ???? ??? ????? ?? ??? ???????? ???. ?? ????? ????? ???? ??? ??? ??? ???? ??????? ????? ??? ???? ??? ???? ????? ????? ???? ???? ???? ??????? ????? ?? ??????? ??? {???? ???? ???? ?? ?? ?????? {????? ??? ??? ???? ??? ??? ????? ???? ???? : ??? ?? ??? ????? ??? ????? ???