> 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/2019/01/23.md).

# 23

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MTU1OdKS1vUlV-AVRs7%2F-MTU1djVcksQEIwHdwAA%2Fimage.png?alt=media\&token=97e1c5e3-306c-4a26-b6ec-f0ff056bbc68)