I need someone to test this code I wrote (fallout hacking minigame)

[BeardedPC]

I've written a program in python, and have run it several times to ensure it works. It seems to be working just fine. But I want to get a second opinion and make sure it is as good as it can be. The program can be found here: https://repl.it/@BeardedPC/recreation[^] I'm also trying to implement a way for the secret code to also turn into .'s when used, but it either doesn't work, works once, or works on ALL of them. This isn't needed, but if you feel compelled, by all means, give it a go. as well as figure out how to fix the problem with the letters correct bit