s s s f-a s - o - s d f s- l h - h-f h-d g-f s - s - d d f s-a d - d-o s - f s a s - o - s d f s- l h - h-j l-j h-g h - f - s d f d-p s - s-j l-j h-g l-h g-f j--- j-g f-d s--- s d f s- l h---- s d f d-p s