What Error?!

[uber1337]

Actually this was my first program! So some of the programming is very redundant.

ahh ok. Python is my first language so I have never really done more than I need to. You will get the hang of it after a while.

btw : I just took another quick look at your program, I don't think you can make a decryptor because of:

Code:

start_1 = random.choice(aa)

For example, entering the letter "h" will spit out a different string each time, and if the encryption is different each time, it will be impossible to decrypt.