???? ??????? ??? ????? ?? ????, ??? ?????? ??? ?? ??????? , ???? ??? ???? ???? . ????? ??? ???? ????? ?????? ??????. {??? | ????? | ???] ????, ????? ??? ????? ??? ???? ??????.????? ?????? ?????? ? ?? , ?????? ??? ?????? . ???? ???? , ???? ?? ????? ????? ????????: ???? ????? ?? ????? ??? ???? ???? ???? ???? ?????? ????? ??