?????? ????????, ???????? ?? ????????????????: ????????????? ??????.(??~ ?????? ???? = ??~ ?????? ????)???????? ??, ??? ???? ?????????? ???? ???? ??????????.???????? ???? ?? ?????? ???????? ???? ????. ?? ???? ?? ???? ??? ???????? ??????????? ?????????? ???? ????????? ?????? ?? ???????????? ???????? ????.???????? ??? ?????? ???????? ??? ????????????