???? ????? ??????? ?? ?????? ?????? ???? ???? ??? ??????? ?? ???? ????? ??????. ????? ??? ??????? ??????? ???? ?????? ??? ??????. ????? ??????? ??????? ?????????. ????? ?????? ?????? ?????? ?? ???????. ???? ??????? ??????? ??????? ????? ?? ???????. Picking ???? ????? ??????? ??? looking for ???? ?????? need to consider ??? factors. ????