matrix := [
[0,5,4,0,0,6,0,0,2,6,0,5,4,4],
[2,0,0,3,4,0,0,0,0,0,0,4,0,0],
[0,5,4,2,0,0,0,0,0,4,0,5,0,0],
[0,4,2,0,0,3,2,4,0,3,0,4,4,2],
[0,5,0,0,0,0,0,0,0,0,0,0,0,0],
[5,4,4,0,0,0,0,0,0,3,5,0,0,0],
[4,5,4,4,4,4,0,0,0,4,0,5,0,4],
[5,3,5,4,3,0,2,0,0,4,0,3,0,0],
[0,0,5,4,5,0,3,3,0,0,0,3,5,0],
[0,0,0,3,2,4,0,0,0,0,0,4,0,5],
[0,5,4,4,4,3,0,0,5,0,0,5,3,3],
[0,0,5,0,0,0,2,4,0,0,0,4,4,0],
[0,5,4,0,0,0,3,4,0,4,0,2,3,0],
[3,5,0,0,0,1,0,0,0,5,3,0,0,3]
]*Z(7);