@[email protected] https://ja.wikipedia.org/wiki/%E5%B1%B1%E4%B8%8B%E9%A7%85_(%E5%85%B5%E5%BA%AB%E7%9C%8C)#%E6%97%A5%E7%94%9F%E7%B7%9A%E3%81%AE%E5%8C%BA%E9%96%93%E5%88%97%E8%BB%8A%E3%81%AE%E9%81%8B%E8%A1%8C%E5%BD%A2%E6%85%8B
思考の /dev/null
