e------------------------------------------------------------------------------------------- b----10--12--13/15--13--12--13--12--10--12--10--8--10----------------------------- g------------------------------------------------------------------------------------------- d------------------------------------------------------------------------------------------- a------------------------------------------------------------------------------------------- e------------------------------------------------------------------------------------------- e------------------------------------------15---------------------------------------------- b----10--12--13--15------13--12--13-------13--12--13/15---------------------------- g------------------------------------------------------------------------------------------- d------------------------------------------------------------------------------------------- a------------------------------------------------------------------------------------------- e------------------------------------------------------------------------------------------- / - slide