e-----------0--------------0--------------0---------------0-----------------| b---------------------------------------------------------------------------| g--------4--------------2--------------6--------------4---------------------| d-----2--------------2--------------6--------------4-----------X2-----------| a-----------------0--------------4--------------2---------------------------| e--0------------------------------------------------------------------------| e-------------------------------------------------------------------------| b-------------------------------------------------------------------------| g---9----------6----------6---------4-------------------------------------| d---9---<-X8---7--<-X8----6--<-X8---4--<-X8--------------------X2---------| a---7----------0----------4---------2-------------------------------------| e-------------------------------------------------------------------------|