matrix := [
[2,6,0,0,0,0,0,0,0,0,0,0,0],
[0,0,7,0,0,0,0,0,0,0,0,0,0],
[12,5,11,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,7,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,7,0,0,0,0,0,0],
[0,0,0,0,0,0,0,7,0,0,0,0,0],
[0,0,0,7,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,7,0,0],
[0,0,0,0,0,0,0,0,0,0,0,7,0],
[0,0,0,0,0,0,0,0,0,0,0,0,7],
[0,0,0,0,0,7,0,0,0,0,0,0,0],
[3,2,10,3,5,0,5,3,12,6,10,8,7],
[12,1,8,12,8,3,6,4,10,8,6,3,12]
]*Z(13);