6:00,6:20,6:40,7:00,7:20,8:00,8:30,9:00,9:20,9:40,10:00,10:20,10:40,11:00,11:20,11:40,12:00,12:20,12:40, 13:00,13:15,13:30,13:45,14:00~20분간격으로23
당신은 어느 그룹입니까?