a1xn b1xn2 c1xn2a d1xn e1xn2

zryn2 0ryn2a 1ryn 2ryn2 3ryn2a

oizn2a pizn qizn2 rizn2a sizn

d9zn e9zn2 f9zn2a g9zn h9zn2

2z0n2 3z0n2a 4z0n 5z0n2 6z0n2a