s a o s a o s a o s a o p - p-a s-f d - t r w t r w t r w t r w e - e-r t-u y - t r w t r w t r w t r w e - r - t - y-u u---- i - u-t y--t y u u u o o o t--- i - u-t y--t y u u u o-o p - o - i u t i u t i u t i u t t---- s a o s a o s a o s a o p - p-a s-f d - s a o s a o s a o s a o p - a - s - d-f f---- g - f-s d--s d f f f h h h s--- g - f-s d--s d f f f h-h j - h - g f s g f s g f s g f s s---- g f s g f s g f s g f s s