I played C, Am, F, G on the guitar: rock'n'roll! Hmm... Yes, we do have some ancient Finnish melodies in Finland, or some newer ones from the 1800's but they are not played that often... It is like Dorian mode up and down. Like "Old Steady Wainamoinen, Sage Forever"... Hmm... D, E, F, G, A, A, E, E... G, G, F, F, E, E, D, D.