C2 x S4 x S3
r0 := (1,2)(3,5)(4,6)(8,11)(9,12)(14,16);
r1 := (1,2)(3,7)(4,9)(5,10)(6,12)(8,13)(11,15)(14,18)(16,17);
r2 := (1,3)(2,5)(4,8)(6,11)(9,14)(12,16)(13,17)(15,18);
r3 := (1,4)(2,6)(3,8)(5,11)(13,17)(15,18);
F := FreeGroup(4);
r0 := F.1;; r1 := F.2;; r2 := F.3;; r3 := F.4;;
G := F/[ r3^2, r0^2, r2^2, r1^2, (r2*r0)^2, (r2*r3)^2, (r0*r3)^2, (r1*r0*r1*r3)^2, r0*r1*r2*(r1*r0)^2*r2*r1, (r1*r3*r1*r2*r3)^2, ((r1*r2)^2*r1*r3)^2, (r1*r0*(r2*r1)^2*r2)^2 ];;
type 0: 4 elements
type 1: 36 elements
type 2: 6 elements
type 3: 6 elements