This is a pair of two custom blocks I made for compressing strings and decompressing them. This type of thing won't really help for normal words, but it would work great for level codes or the like! (Anything that has a lot of the same letter in a row would work really well for this.)
If you're interested, you can read more about Run-length encoding here: http://en.wikipedia.org/wiki/Run-length_encoding Feel free to use this for whatever you like! I won't mandate you give credit, but if you do, that'd certainly be nice. :)