z1 := (1,3,4)(2,5,6)(7,11,12)(8,13,14)(9,15,16)(10,17,18)(19,27,28)(20,29,30)
     (21,31,32)(22,33,34)(23,35,36)(24,37,38)(25,39,40)(26,41,42)(43,46,55)
     (44,45,56)(47,57,58)(48,59,60)(49,52,61)(50,51,62)(53,63,64)(54,65,66)
     (67,77,71)(68,78,70)(69,79,80)(72,81,76)(73,82,75)(74,83,84)(85,93,87)
     (86,94,88)(89,95,91)(90,96,92);