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