Assume you want guitar chords.

I don't know whose version you're listening to -- tune accompaniments vary, as you know -- but here's how I play it:

A part:
D G D   D G D   D G D   A D
D G D   D G D   D G D   A D
A D   G A D   A D   G A D

B part:
F   C   F   Dm   
F   C   D   Dm
Bb   Bb?*   A   A7

*The ? chord is a Bb with the F (D string, 3rd fret) lowered one fret to E: fingering x 1 2 3 3 x

Hope this helps!
Michael