Riff A
E|--------------------------| Chorus
B|--------------------------|
G|---------------------5----|
D|-7-7-5-7-7-5-7-7-5-7-5----|
A|-7-7-5-7-7-5-7-7-5-7-3----|
E|-5-5-3-5-5-3-5-5-3-5------|


Riff B

E|--------------------------| palm muted
B|--------------------------|
G|--------------------------|
D|--------------------------|
A|---------------------3----|
E|-5-5-3-5-5-3-5-5-3-5------|

Riff C

E|---------| Bridge
B|---------|
G|---------|
D|---------|
A|---------|
E  |-5-3-2-3-|


Riff A 2x
Riff B 4x
Riff C 1x
Riff A 2x
Riff B 4x
Riff A 4x
Riff B 4x but sometimes different from the original.
Riff C until the song is over...