I'm fairly certain eos367 is a guy 
Anyway, there's only 4 characters in the code that don't have a matching character. 2, 4, 0, and D. I looked at my other codes and I don't see any sort of rule dictating this, but maybe? >_>
You could also try plugging in the hex values of MAPLEWORLD or MAPLESTORY in the appropriate places since they're the same length. Dunno.
Anyway, there's only 4 characters in the code that don't have a matching character. 2, 4, 0, and D. I looked at my other codes and I don't see any sort of rule dictating this, but maybe? >_>
You could also try plugging in the hex values of MAPLEWORLD or MAPLESTORY in the appropriate places since they're the same length. Dunno.