matrix := [
[0*Z(9),0*Z(9),Z(9)^8,0*Z(9)],
[Z(9)^3,Z(9)^8,Z(9)^1,0*Z(9)],
[Z(9)^4,0*Z(9),Z(9)^4,0*Z(9)],
[Z(9)^8,0*Z(9),Z(9)^6,Z(9)^8]
];