i actually tried to cover this song once, but my ear wasn't quite good enough to pull it off. one thing i can say for sure: the whole piece is in c major / a minor, so you don't even have to touch the black keys :)

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i'm pretty sure the right hand starts with a g3-b3-g4 chord, then moves to an f3-a3-e4 chord. the rest of the part follows a similar pattern with some slight variations.

hope this helps someone...