riff 1a
E|--------------------------------------------------------------------------|
B|--------------------------------------------------------------------------|
G|--------------------------------------------------------------------------|
d-222233334444555522221111222233334444555522221111333344445555666633332222-|
a|--------------------------------------------------------------------------|
e|--------------------------------------------------------------------------|

riff 1b
E|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|-555566667777888855554444--------------------------------------------------|
A|--------------------------222233334444555522221111222233334444555522221111-|
E|---------------------------------------------------------------------------|

riff 1c
E|--------------------------------------------------|
B|--------------------------------------------------|
G|--------------------------------------------------|
D|--------------------------------------------------|
a-333344445555666633332222555566667777888855554444-|
e|--------------------------------------------------|

riff 2 here is played 4 times
E|--------------------|
B|--------------------|
G|--------------------|
D|--------------------|
A|--------------------|
e-222222111111000000-|