matrix := [
[0,7,0,0,0,0,0,0,0,0,0,0],
[7,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,7,0,0,0,0,0,0,0,0],
[0,0,7,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,7,0,0,0,0,0,0],
[0,0,0,0,7,0,0,0,0,0,0,0],
[2,2,6,6,6,6,6,0,0,0,0,0],
[0,0,0,0,0,0,0,0,7,0,0,0],
[0,0,0,0,0,0,0,7,0,0,0,0],
[3,3,0,0,8,8,0,10,10,6,0,0],
[0,0,7,7,10,10,0,10,10,0,6,0],
[10,10,9,9,8,8,0,11,11,0,0,6]
]*Z(13);