s d f d s a s a p o p o i - o s d f d s a s o p s P---o s d d s s-s-d- D---s d D s d--s d f d s a s a p o p o i - o s d f d s a s o p s P---o s d d s s-s-d- D---s d D s d--d D g - D d-D- g - D d-s- P-s-d-D- g - D d-D- g - D d-s- P-s-d-D- g-a-o-f g h - g f-g- h - g f-d- s-d-f-g- h - g f-g- h - g f-d- s---f g h - g f-g- h - g f-d- s-d-f-g- h - g f-g- h - g f-d- s