l- s-l- h j h f s-o- s d f g h-l---- l- s- l- h j h f s-o- a s d f g-k---- k- a- k- g h g d a-a- a s d f g-k - {hhhhhhhhhhhhhhhh}---- g h f- {jjjj}-- g h j g- {kkkk}-- d f g d - k - {kkkk}-- g-d-- l- s-l- h j h f s-o- s d f g h-l - {jjjjjjjjjjjjjjjj}---- k- a- k- d f g f O-H- f g f j f-l---- l- g- l-- l- D-l-- l- f-l---- l