????? ??????? ???????? ????? ???? ??????? ??? ??????? ?? ???????? ??????? ????????????? ?? ???? ??? ??????? ??????? ??? ?? ????? ??????? ?????? ??????? ?? ??????? ???? ??? ???? ???? ?? ???????.??? ???????? ??? ?? ???? ??????? ????? ??? ?????? ???? ????? ?????? ????? ?? ???????? ????? ???? ??????? ??? ???? ???????? ???????? ??? ???? ???? ???????.How