????? ??? A ??????????????? ???? ??????? ??? ??????? ???????? ???????????? ??? ??????? ???? ??? ????? ??? ?????????? ????????? ???????????????? ?????????? a ?????? ??????????????? finish ????? ???? ????? ??????????????????????? ???? ??? ?????????? ?????????? ???????????????????????? ???? ???? ????????? ?????????? conclusion ??? kind ??????? on the