G:= PermutationGroup<12 | \[ 2, 3, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12 ], \[ 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 2 ]>; size:= 239500800; name:= "A12"; compfactor:= < 17, 12, 0 >; M:= 1; A:= 1;