matrix := [
[2,6,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,7,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,7,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,7,0,0,0,0,0,0,0,0],
[4,7,5,0,11,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,7,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,7,0,0,0,0],
[12,9,6,11,0,7,6,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,7,0,0],
[10,1,4,0,0,6,7,4,9,4,0,10,0,0],
[10,0,9,5,11,12,7,0,7,4,4,2,0,0],
[0,0,0,7,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,7],
[12,6,5,10,1,2,0,7,4,6,0,4,6,0]
]*Z(13);