e-----------------------|
B---------13------------|
G-----------10----------|    X3
D-12-10-12----10-12-----|
A-----------------------|
E-----------------------|

e--------------------------------------------|
B--------------------------------------------|
G--------------------------------------------|
D---12-12-12-12-12-12-12-10-10-10-10-8-8-8-7-|
A--------------------------------------------|
E--------------------------------------------|