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