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