e-----------------------------------------------------------------| b-----------------------------------------------------------------| g------1--------1---------------6------6--------------------------| d-----------------------------6------6-------------5--------5-----| a---3--------3----x2-------4------4------------6---------6--------| e-1-------1--------------------------------4----------4-----------| e-------------------------------------------------------------| b--9--9--9--9--9--9----6--6--6--6--6--6---4--4--4--4--4-------| g----8--8--8--8--8--8----6--6--6--6--6--6---5--5--5--5--5-----| d-------------------------------------------------------------| a-------------------------------------------------------------| e-------------------------------------------------------------|
