matrix := [ [0,3,0,0,0,0,0,0], [2,2,0,0,0,0,0,0], [0,0,0,0,3,0,0,0], [0,0,0,0,0,0,3,0], [0,0,2,0,2,0,0,0], [3,3,0,1,3,4,4,4], [0,0,0,2,0,0,2,0], [2,1,1,0,2,2,4,3] ]*Z(5);