Introducción E||-12-----12--10-----10--8-----8--7---------| B||---13-13--13--12-12--12-10-10-10-9-9------| G||------------------------------------9-----| D||------------------------------------------| A||------------------------------------------| E||------------------------------------------| E||-12-13-12-----12--10-12-10-----10--8-10-8-----8--7-8-7------------| B||---------15-13--13--------13-12--12------12-10-10-----10-9--------| G||----------------------------------------------------------9-------| D||------------------------------------------------------------------| A||------------------------------------------------------------------| E||------------------------------------------------------------------| E||-12-12-13-12----------------------17------------------------------| B||------------15-13-12--------13--13--17----------------------------| G||--------------------14-13-14--14------17-14-----------------------| D||------------------------------------------------------------------| A||------------------------------------------------------------------| E||------------------------------------------------------------------|