Submarines Chords

This is obviously not a guitar song, but as close as I can get to it is this. Verse, i.e. 1 G. C D G B I believe, submarines (backing vocals) G. C D G. B Underneath, deep blue sea (backing vocals) G. C. D G B Saw the flag, Japanese (backing vocals) G. C D. G. B No one will, believe me (backing vocals) Chorus I.e. Chorus 1 Em. D. G Ran back to the town folk and I told the people how Em. D. C. I’ve seen a submarine and everyone laughed and laughed