Each puzzle features 16 words and each grouping of words is split into four categories. These sets could comprise of anything from book titles, software, country names, etc. Even though multiple words will seem like they fit together, there's only one correct answer.
（三）买卖或者使用伪造、变造的国家机关、人民团体、企业、事业单位或者其他组织的公文、证件、证明文件、印章的；
，这一点在heLLoword翻译官方下载中也有详细论述
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An important note is that the number of times a letter is highlighted from previous guesses does necessarily indicate the number of times that letter appears in the final hurdle.