z1 := (2,4)(3,5)(6,10)(7,11)(9,12)(13,19)(14,20)(15,21)(16,22)(17,23)(18,24)
     (25,36)(26,37)(27,38)(28,39)(29,40)(31,41)(32,33)(34,42)(35,43)(44,55)
     (45,56)(46,57)(47,58)(48,59)(49,60)(50,61)(51,62)(52,63)(53,64)(65,69)
     (66,73)(67,72)(68,76)(70,75)(71,77)(74,78)(79,82)(81,83);