?????? ???? ???? ????? ????? ?????? ???? ????????? ???? ????? ??????. ???? ?????? {???????? ???? ?? {???(?)????? ???????? ? ???????? ??? {?? (?)?????? ?????? ???? ????? ? ??????. ??? ???? ?????: ???? ????? { ???? ?????? ???? ????? ???? ??????? ??????? ????? ?? ????? ????? ?? ????? ????? ?? ?? ???