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