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