/*
www-ATLAS of Group Representations.
21.M20 represented as permutations on 12 points.
*/

G<x,y>:=PermutationGroup<12|\[
1,2,3,7,5,8,6,4,12,9,10,11]
,\[
2,4,5,1,6,3,9,11,10,7,12,8]
>;
print "Group G is 21.M20 < Sym(12)";