Using Pi's digits, this bear is very smart and decodes the English language to a very complex language. For example, the first time a P may be a y, but the second time you put a p in the same word, it could be a 7. Up arrow to reset everything.
I read a book about German codes during WWII (or WWI, I don't remember), and I thought it might be interesting to make a code kind of similar.
