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