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.
Rachel Stonehouse,BBC West Investigationsand
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// 创建临时数组存储左子数组（右子数组可直接用原数组）
Фото: Sergei Grits / AP