“1) OOOA OOAO”应属于一种安排吧？把它们排列成圈，看不出区别了。这样就是11种了。

来源: 皆兄弟也于 2010-10-17 19:45:12 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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