z1 := (1,2,3)(4,6,7)(5,8,9)(10,14,15)(11,16,17)(12,18,19)(13,20,21)(22,28,29)
     (24,30,31)(25,32,33)(26,34,35)(27,36,37)(38,44,39)(40,45,46)(41,47,42)
     (43,48,49)(50,54,51)(52,55,53);