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