matrix := [ [0*Z(4),Z(4)^3,0*Z(4),0*Z(4),0*Z(4),0*Z(4)], [Z(4)^3,0*Z(4),0*Z(4),0*Z(4),0*Z(4),0*Z(4)], [0*Z(4),0*Z(4),0*Z(4),0*Z(4),Z(4)^3,0*Z(4)], [Z(4)^3,Z(4)^3,0*Z(4),Z(4)^3,0*Z(4),0*Z(4)], [0*Z(4),0*Z(4),Z(4)^3,0*Z(4),0*Z(4),0*Z(4)], [Z(4)^2,Z(4)^2,0*Z(4),0*Z(4),0*Z(4),Z(4)^3] ];