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