?? ??? ???? ????? {?? ??? ???? ? ???? ????? ??? ??? ???? ?? ??????? ????????? ?????????. ????? ?????? ???????? ????? ???? ??????? ??? ????? ???????? ?? ????? ?????? ????? ?????. ??????? ???????? ?? : {????? ??????? ???? ???? ? ???????? ?? ???????? ????????? ????????? {????? ????? ???????? ????? ?????? ???????? {????? ???????? ??