???? ???? ??????? ?? ?????? ?????? ???? ???? ??? ??????? ?? ???? ??? ????????. ????? ??? ??????? ??????? ???? ????? ??? ??????. ????? ??????? ??????? ?????????. ????? ?????? ?????? ?????? ??????. ???? ??????? ??????? ????? ????? ?? ???????? . Picking ???? ????? ??????? ??? ????? ???? ?????? is important consider ??? ?????. , First and f