> 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/2019/01/27.md).

# 27

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MTU1yBhlcoHvZWcSwXy%2F-MTU2EDZUBllObqd-kTW%2Fimage.png?alt=media\&token=3051cd70-4a2d-41cc-b6a5-c3ae332e163d)