b := (1,50,20,70)(2,60,12,36)(3,22,16,55)(6,31,7,69)(8,40,21,79)(9,62,13,
29)(10,49,17,84)(15,43,18,77)(23,26,48,72)(24,56)(25,42,82,37)(27,
65)(28,35,51,75)(30,32,41,81)(33,66)(34,59)(38,78)(39,80,68,67)(44,
73,61,64)(45,76)(46,74,54,58)(47,85)(52,71)(53,83,63,57);