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