matrix := [
[0,6,0,0,0,0,0],
[6,0,0,0,0,0,0],
[0,0,0,0,6,0,0],
[0,0,0,0,0,6,0],
[0,0,6,0,0,0,0],
[0,0,0,6,0,0,0],
[0,0,7,9,7,9,5]
]*Z(11);