It is very easy to catch, especially if you've never had it before.
村里的老人记得那天“交易”的情形：阿爸被放在一个旧菜篮子里，垫着布。篮子旁挂着一捆用红绳扎着的长寿面。阿嬷把钱交出去，孩子抱走。
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generated code may not always be optimal or efficient
Consider some of the more obscure tests that implementations must pass: