??????? ???? ????? ?????? ??? ???? ?????? ???????? ? S N 168 ???? ????????? ??? ?????? ! ??????? ?????????? ???????? ???? ??????? , ????? ?????? ??????? ?????????? ??????????? ?????? ??????????? ????? ?????? ???????? ???????? ??? ???? . SN168 : ????! ?????? ???? ??? ??????? ?????! ???????????? ??? SN168, ???????????? ???????