/*
www-ATLAS of Group Representations.
L3(4) represented as permutations on 21 points.
*/

G<x,y>:=PermutationGroup<21|\[
2,1,5,4,3,9,10,12,6,7,17,8,19,15,14,16,11,18,13,20,21]
,\[
1,3,6,2,7,4,11,5,13,15,8,18,20,9,21,10,19,12,17,14,16]
>;
print "Group G is L3(4) < Sym(21)";