1 00:00:23,033 --> 00:00:23,816 수소, 헬륨, 리튬, 베릴륨, 붕소 2 00:00:24,033 --> 00:00:24,783 탄소, 질소, 수소, 불소, 네온 3 00:00:25,033 --> 00:00:26,133 3.1415926
