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