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