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