Introducción: E|-------11--------12-------12------11------ B|----12--------11-------11-------12--------- G|-11--------11-------11-------11------------ D|------------------------------------------- A|------------------------------------------- E|------------------------------------------- E|-------11-11-11-------12-12-12-------12-12-12-------11---- B|----12-------------11-------------11-------------12------- G|-11-------------11-------------11-------------11---------- D|---------------------------------------------------------- A|---------------------------------------------------------- E|---------------------------------------------------------- E|-11----9----7---6---5----------------------------------------------- B|----12---11---9---7---6---------------0----------------------------- G|-------------------------------------------------------------------- D|-------------------------4-4-2------4---------------------4-4-2----- A|-------------------------------4-2-------2-1--------------------4-2- E|---------------------------------------------4---2-0-1-2------------