matrix := [
[0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0],
[7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7],
[10,4,12,8,2,6,0,12,6,0,10,4,2,2,9,8],
[3,10,11,5,5,10,1,11,11,0,12,0,4,0,0,9],
[4,12,12,2,12,12,9,2,2,5,1,0,4,10,5,9],
[0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0],
[8,8,5,0,12,0,7,3,10,12,11,12,11,1,7,5],
[3,0,11,3,9,5,7,3,1,12,12,12,12,9,12,5]
]*Z(13);