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