the bass is doing a duet with the piano (and the cat sits on the mat)

intro
G|--------|
D|--------|
A|33-3-33-|
E|--------|x5

verse
G|--------|
D|--------|
A|33-22---|
E|-----00-|x4

then
G|--------|
D|--------|
A|--------|
E|00-0-11-|x4

thats all there is to it