Thanks to mlcreator for pointing out a mistake I made.
This uses a series of if blocks that check what each character in the input is, add two numbers at a time to a cloud variable, separates the blocks of two numbers and turns them back into regular characters. Basically the standard if you didn't know. I could have done a better job with lists that run through all the characters and 2 digit codes, but I didn't want to have to restart from scratch.