o-f f d s f h f d f d s p o s-d f d f d s p o-f f d s f h f d f d s p o s-d f s s s-p o-f f d s f h f d f d s p o s-d f d f d s p o-f f d s f h f d f d s p o s-d f s s s f h j - j h f j l j j h f h j h h f h l-j h f d s-d f-h j l j h f d s p o s-d f s s s-p