matrix := [
[0,6,0,0,0,0,0,0],
[0,0,7,0,0,0,0,0],
[6,0,0,0,0,0,0,0],
[0,0,0,0,7,0,0,0],
[0,0,0,0,0,0,7,0],
[0,0,0,0,0,0,0,7],
[0,0,0,7,0,0,0,0],
[11,2,2,6,6,6,6,6]
]*Z(13);