/*
www-ATLAS of Group Representations.
21.M20 represented as permutations on 20 points.
*/

G<x,y>:=PermutationGroup<20|\[
1,5,3,8,2,11,9,7,4,15,6,19,17,14,10,16,13,20,18,12]
,\[
2,4,6,1,10,7,3,13,15,12,17,5,14,8,16,9,18,11,19,20]
>;
print "Group G is 21.M20 < Sym(20)";