o a s f s a [1o] a s f s a [2o] a s f s a [3o] a s f s a [4o] a s f s a [5o] a s f s a [6o] a s f s a [7o] a s f s a [8o] a s f s a o--- d---d a o I y r w Q 9 7 5 $ 2--- 2---j--- 3---k--- 4---l--- 5---z--- x z l j f d s p u y t e 0 9 8 5 4---- 3---t-y-u- r-t-y-e-r-t- i-y--8-9-0- 7-8-9-6-7-8- q-9