Seems easy huh? Oh no, you have to think what and what can make what? It's not so simplistic, it's more like guessing while trying to be god. Mind bending addicting.
Traverse Town - Kingdom Hearts:
Try typing in T, Y, J, U, Y, U, T, W, E, T, F, Y, E, T, F, T, Y :[Repeat]:
In note terms: F#, G#, B, A#, G#, A#, F#, C#, D#, F#, F, G#, E, F#, F, F#, G# :[Repeat]:
I didn't figure it all out from memory...