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