> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2017/03/25.md).

# 25

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MTY0jHma6cCe580vDXA%2F-MTY0qD4w3B1iL-0Qy-8%2Fimage.png?alt=media\&token=051afe55-25dc-42df-9dbe-723f44869285)