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