????? ????? ??? ?????? ?? ????? ?????? ??????? ?? ??????. ???? ????? ?????? ???? ??????? . ???? ???? ????? ??? ?????? ?????? ?? ????? ????????? . ????? ????? ????? ?????? ????? . ???? ??? ??? ??????? ?????? ???? ???? ????? ????? ????? ??????? ?????? . ??? ??? ???? ????? ??????? ?? ??????? ????? ????? ??? ?????? ??optimum . ????