????? ???? ???? ??? ??? ???? ?????? ???????? ? S N 168 ??? ????? ??? ???????????! ?? ??? ???????? ???? ????????, ????? ?????????? ?????? ??????? ??????? ?????? ??????????? ????? ?????? ???? ???????? ??? SN168 . ???????? : ????! ?????? ???? ??? ??????? ?????! ??????????????? ??? SN16