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