I like the level, and I agree that using/building arrays should be practiced, but this level is so much easier to solve with a simple for loop… so it would be better to find a way to “enforce” the use of arrays (don’t ask me how).
Also, I just realised with this level that advanced list comprehension ( ["a" if expression else "b" for item in list] ) is not understood by CodeCombat’s python interpreter, but that will not concern most users 