I'm not a guitar player, but I have 3 versoins w/chords:
A minor(Aeolian)Am,G,Am,Am,G,Am,G,Am
A Dorian Am,G,Em,Am//(Bpart)G,Am,Am,G,Em,Am
G Major(but it ends on A)C,G,C,G,D,//(B part) D,G,D,C,G,D. Does that help any?