Examples: The samples directory has working code for common patterns
How to watch: Monarch: Legacy of Monsters Season 2 premieres Feb. 27 on Apple TV.。关于这个话题，同城约会提供了深入分析
Раскрыты подробности похищения ребенка в Смоленске09:27，详情可参考同城约会
输出：[4,2,4,-1,4]（最后一个 3 绕一圈找到 4）