???????? ????????????? ???????????????? ???????????????????? ????? ????? ?????????? ??????? ?2 ?? ?????????????? ??????????? ?????. ????? ?????? ?????? ????????? .{ ????????? ?????? ????? ??????? ?? ??? ??????? ????? ?????? ?? ??????? ?????????? ??? ??????? ?? ???? ????? . {???? ????? ??? ????? ????? ??????? ?????? ?????? ???