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