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