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