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