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RE: Day 258 - Teaching Kids Programming - Arithmetic Sequence Permutation 等差数列排列
8-13: you have been voted on nrm/2ua9rx-it-s-a-common-and-popular-fruit-tree-and-that-is-banana-tree
8-12: you have been voted on nrm/sunset-photography-few-moment-ago-of-the-sunset