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