s f f a d d s d f g f d s f f a d d s f d s p o s f f a d d s d f g - h f s g f d s f d s p o s f f a d d s d f g f d s f f a d d s f d s p o s f f a d d s d f g - h f s g f d s f d s p o o u o o-f g - f s p o u o o u o s f d s p o o u o p i p d f d d f g h f s g f d s f d s p o o u o o-f g - f s p o u o o u o s f d s p o o u o p i p d f d d f g h f s g f d s f d s p o f h h d h h s d f g f d f o o d o o s f d s p o f h h d h h s d f g - h f s g f d s f d s p o