e---------------------------------------------------------------------------| b---------------------------------------------------------------------------| g---------------------------------------------------------------------------| d---------------------------------------------------------------------------| a--xx-12-12-12-7-7-7-9-9-9-5-5-5-x-x-x-x-12-12-12-7-7-7-9-9-9-5-5-5-x-x-----| e--xx-12-12-12-7-7-7-9-9-9-5-5-5-x-x-x-x-12-12-12-7-7-7-9-9-9-5-5-5-x-x-----|