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