direct_input [[category:direct_input]] * 출처: [[https://commons.wikimedia.org/wiki/File:SporadicGroups.svg|Wikimedia Commons]] * 저작권: [[https://creativecommons.org/licenses/by-sa/3.0/deed.ko|저작자표시-동일조건변경허락 3.0 Unported (CC BY-SA 3.0)]]
