j - j h f d - f h f s-f d-f s---- os d f f h h d d-h h h g g g s d g f - f d s p p f d s d p - s f g f d s s p p o--- os d f f h h d d-h h h g g g s d g f - f d s p p f d s d p - s f p o---g f d s s f d--h g f s s s f f f d d h h h h g g g s d g f - f f j f s f f f f d p f d s s p s g f d s--s s p-u p d f d f - s s g g g g g h h--s s p-u p d f d f - s s j j j j h g h--j-k--- f s s s f f f d d h h h h g g g s d g f - f f j f s f f f f d p f d s s p s g f d s--s s p-u p d f d f - s s g g g g g h h--s s p-u p d f d f - s s j j j j h g h--j- k