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