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