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.
One annotator sums it up:
。业内人士推荐体育直播作为进阶阅读
and organic keywords.
DRY: extract helpers and utilities
Медведев вышел в финал турнира в Дубае17:59