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