t - s s-s- d s d a s-s d f d f s g f g d f d f s d s d a t--s-- d s d a s-s- a s d f d s a p o-o-o i u y t--s-- d s d a s-s d f d f s g f g d f d f s d s d a t--s-- d s d a s-s- a s d f d s a p o-o-o- h g h g f d s a p o p-i-i-j h j h j h g f d s a-o-o-h- h g h f j-j- h g h f j-j- h l k j h g f d s--s- h g h g f d s a p o p-i-i-j h j h j h g f d s a-o-o-h- h g h f j-j- h g h f j-j- h l k j h g f d s-s-s