The intro is
E|-----------------------------------------------------------------------|
B|------7--------7--------7--------7-------------------------------------| play this measure
G|----------7--------7---------7-------7---------------------------------| twice
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|

then
E|-----------------------------------------------------------------------|
B|--7-----7-----7-----7-----7----7-----7---------8-----------------------|
G|-----7-----7-----7-----7----6-----6-----6__7------7--------------------| play this four times
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|

During that part after the 2nd verse
E|-----------------------------------------------------------------------|
B|---3-----3-----2-----3-----2-----2-----2---------3---------------------| play this twice
G|------2-----2-----2-----2-----3-----3-----3__4------4------------------|
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|