‘???(Master)’? ?? ?? ??? ??? ?? ?? ??? ???? ??? ??. ??? ?????? ???? ?? ???? ???? ‘???’? ????.
????? ?? ???????? 40~49?? ???? ??? ???? ‘????’, 50~59? ???? ‘???’, 60~69? ???? ‘???’?? ??? ??? ??? ?? ?? ‘????’?? ??. ?? ? ??????? ??? ??? ‘???’?? ???? ??. ???? ??????? ????? ‘???? ???? ???? ??? ???’ ??? ???? ??.