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