The Len(language,encoding) family of languages is a variety of Lenguage derivatives. To encode a program into a Len language, you replace every character with its representation in a certain encoding, then turn that into a giant integer.
Your challenge is to write a function or program that encodes your language into a Len language. However, you can make up your own encoding, and it only needs to encompass the subset of your language that is used in your program. But, you must have at least two distinct bytes in your program.
Your program must be able to take itself as input.
You can just output a number as the length of the compiled program, to avoid memory problems.
Your program must be reversible.
Your score is the result of your program run on itself. You're trying to minimise this.