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

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