> For the complete documentation index, see [llms.txt](https://sovietbeast-writeups.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sovietbeast-writeups.gitbook.io/writeups/ctfs/fetch-the-flag-2023/warmup.md).

# Warmup

- [beep64](https://sovietbeast-writeups.gitbook.io/writeups/ctfs/fetch-the-flag-2023/warmup/beep64.md): Warmup, DTMF, T9, base64