r1:=(1,2,3,4,5,6,7,8,9,10,11,12);
r2:=(1,13,14,15,16,17,7,18,19,20,21,22);
r3:=(4,23,24,15,25,26,10,27,28,20,29,30);

G:=Group(r1,r2,r3);