matrix := [
[0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0],
[0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,0],
[16,4,8,7,11,17,6,7,13,2,6,18,15,0,18,16,16,2,11],
[0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0],
[6,14,1,8,10,6,16,17,5,14,10,9,8,14,9,8,1,14,18],
[10,3,6,7,3,16,18,16,11,2,5,18,14,11,18,12,13,17,17]
]*Z(19);