7시이후기준으로07:30,08:00,08:30,09:00,09:30,10:00,10:30,11:00,11:20,11:40,12:00,12:30,13:00,13:30,14:00,14:20,14:40,15:00,15:20,15:40,16:00,16:20등
당신은 어느 그룹입니까?