???? ????? ????? ??????? ???????? ?? ?????? ?????? ???? ???? ??? ????? ?? ???? ??? ??????? ??????? . ????? ??? ??????? ??????? ???? ?????? ??? ??????. ????? ??????? ??????? ??????????. ????? ?????? ?????? ?????? ???????. ???? ??????? ??????? ????? ????? ?? ???????? . Selecting ???? ????? ??????? ??? ????? ???? ?????? ??? evaluate ??? as