matrix := [ [0,0,5,0,0,0,0,0,0,0,0,0], [0,0,0,5,0,0,0,0,0,0,0,0], [0,0,0,0,5,0,0,0,0,0,0,0], [0,0,0,0,0,5,0,0,0,0,0,0], [2,0,6,0,6,5,0,0,0,0,0,0], [0,0,0,0,0,0,5,0,0,0,0,0], [0,0,0,0,0,0,0,5,0,0,0,0], [0,0,0,0,0,0,0,0,5,0,0,0], [0,0,0,0,0,0,0,0,0,5,0,0], [0,0,0,0,0,0,0,0,0,0,5,0], [0,0,0,0,0,0,0,0,0,0,0,5], [6,2,2,3,5,2,4,4,4,2,1,3] ]*Z(7);