だssss https://faq.sej.co.jp/kb/ja/article/entry-grade-1144-%CE%BD%EF%BD%B6%EF%BE%9E%EF%BE%9D%EF%BE%80%EF%BE%9E%EF%BE%91-%EF%BD%BE%EF%BE%8C%EF%BE%9E%EF%BE%9D-%EF%BD%B2%EF%BE%9A%EF%BE%8C%EF%BE%9E%EF%BE%9D%EF%BD%B6%EF%BE%97%EF%BD%B0%E5%8F%96%E6%89%B1%E3%81%84%E3%81%AE%E3%81%94%E6%A1%88%E5%86%85
思考の /dev/null
