intro e|------------------------------------------------| b|---------------10------------------10-----------| g|--/9---9-10-11----11-10-9--9-10-11----11-10-9---| d|------------------------------------------------| a|------------------------------------------------| e|------------------------------------------------| e|-------------------------9--------12-------9-/--| b|--------------10---------10-10-10-9--10-10-10/--| g|--9---9-10-11----11-10--------------------------| d|------------------------------------------------| x 2 a|------------------------------------------------| e|------------------------------------------------|