> 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/2016/11/27.md).

# 27

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MGlbb69XzhuFZVViebY%2F-MGlfNIR5Ynz-zDD_iow%2Fimage.png?alt=media\&token=2f25127d-2523-4b37-a9a4-a97d5e52535a)