matrix := [ [0,0,10,0,0,0,0,0,0,0,0], [0,0,0,10,0,0,0,0,0,0,0], [9,11,1,8,0,0,0,0,0,0,0], [9,1,10,9,0,0,0,0,0,0,0], [0,0,0,0,0,0,10,0,0,0,0], [0,0,0,0,0,0,0,10,0,0,0], [10,7,8,1,9,0,9,0,0,0,0], [0,0,0,0,0,0,0,0,0,0,10], [10,2,2,6,5,17,2,8,11,2,3], [12,0,11,6,5,13,2,9,15,17,2], [0,0,0,0,0,10,0,0,0,0,0] ]*Z(19);