z1 := (1,2,4,5)(3,7,9,10)(6,11,8,12)(13,21,15,23)(14,24,16,25)(17,27,19,29)
     (18,30,20,31)(22,34,26,35)(28,43,32,44)(33,49,36,50)(37,55,39,57)(38,41,
     40,45)(42,60,46,61)(47,63,48,64)(51,69,53,70)(52,71,54,72)(56,74,58,75)
     (59,77,62,78)(65,85,67,87)(66,88,68,89)(73,96,76,94)(79,95,80,93)(81,91,
     83,92)(82,106,84,107)(86,110,90,111)(97,104,99,102)(98,118,100,119)(101,
     121,103,122)(105,120,108,117)(109,123,112,124)(113,125,114,126)(115,127,
     116,128)(129,134,130,136)(131,135,132,133)(137,138,139,140)(141,144,142,
     143);