??? ?? ????? ?????? ??? ????? ????? ???? ?????? ??? ???? ?? ??? ??? ?? ??? ?? ?????? ?????/????? ????? ??/???? ?? ????? ????. ???? ????? ???? ????? ?? ????? ????? ?????/??????? ???????? ? ?? ????? ???? ???. ??? X ??? ??? ??? Z ?????? ??????: ?????? ????? ????? ???? ??? ?? ????? ???? ???? ????? ???? ???????? ??? ?????? ???? ????? ?? ??? ?????