Why would you use this? When using cloud variables on scratch every digit is useful so even a few less digits can help. How does it work? I collected 14.000 usernames using some code @griffpatch wrote to get someones followers in a list, and ran a program to find the most common combinations of 2 letters in them. Then I added the 61 most common combinations of 2 letters to this encoder/decoder. Other: I know I could use 00 for an extra combination of 2 letters. But 00 can be used by people to separate usernames in the cloud so that's why I didn't add anything at 00. 100% by @rens2 Credit would be appreciated.