P:=PermutationGroup<23|(4, 18, 6)(5, 10, 12)(7, 22, 20)(9, 17, 11)(13, 14, 21)(16, 19, 23),(2, 8, 15)(4, 7, 17)(5, 12, 10)(6, 20, 9)(11, 18, 22)(16, 19, 23)>;



print("a Sylow 3-subgroup P of M23");