? ??????? ????? ??????????? ????????????? ?????? ????????? ??????????? ?????, ??? ?? ????? ?????? ???? ??????????? ???? ?? ?????? ??? ?? ????????? ???? ??????? ??? ?? ??????? ??????????? ???? ?????? ?? ????? ?????? ??? ????? ????. ?????? ?? ????????? ????.???????? ?? ????? ??? ??? ?? ??? ?????? ???? ?? ???????.Produce a tracing rule to track unsucc