matrix := [ [Z(25)^24,0*Z(25),0*Z(25),0*Z(25),0*Z(25)], [Z(25)^20,Z(25)^12,0*Z(25),0*Z(25),0*Z(25)], [Z(25)^16,0*Z(25),Z(25)^12,0*Z(25),0*Z(25)], [Z(25)^8,0*Z(25),0*Z(25),Z(25)^12,0*Z(25)], [Z(25)^4,0*Z(25),0*Z(25),0*Z(25),Z(25)^12] ];