> For the complete documentation index, see [llms.txt](https://picoctf2022.haydenhousen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://picoctf2022.haydenhousen.com/cryptography/substitution.md).

# substitution

## Challenge

* substitution0: <https://artifacts.picoctf.net/c/379/message.txt>
* substitution1: <https://artifacts.picoctf.net/c/414/message.txt>
* substitution2: <https://artifacts.picoctf.net/c/107/message.txt>

## Solution

Use [quipqiup.com](https://quipqiup.com/). For `substitution2`, set the solve mode to "statistics."

### Flag

* substitution0: `picoCTF{5UB5717U710N_3V0LU710N_59533A2E}`
* substitution1: `picoCTF{FR3QU3NCY_4774CK5_4R3_C001_4871E6FB}`
* substitution2: `picoCTF{N6R4M_4N41Y515_15_73D10U5_8E1BF808}`