a := (1,67)(3,29)(4,47)(5,15)(6,24)(7,62)(8,41)(9,85)(10,80)(11,70)(12,
18)(13,35)(14,61)(16,44)(17,56)(19,30)(20,50)(21,75)(22,43)(23,
37)(25,59)(26,49)(27,66)(31,82)(32,72)(33,81)(34,40)(36,65)(38,
42)(39,60)(45,64)(48,68)(51,79)(52,83)(53,71)(54,73)(55,78)(57,
84)(58,63)(74,77);