?????? ??? ??????? ?????? ??????? ??? ???? ?????? ?? ?????? {??????.???? ??????? {???????{ ?? ?????? ? ???????? ??????? ?????? ??? ???? ?????? ?????? ????? ??? ??????? ?????? ??????? ??? ????? ????????. ???? ??? ???????: * ?? ???? ??? 21 ???. * ??????? ??? ????? ?????? ?? ?????. * ???????? ???????? ??????. ?????? ???? ???? ?????? ?????? ????