b := ( 1,70,64)( 2,25,19)( 3,36,45)( 4,57,58)( 5,49,15)( 6,46,22)( 7,38,20)
( 8,59,34)( 9,55,30)(10,69,51)(11,67,43)(12,74,40)(13,31,32)(14,44,53)
(16,52,63)(17,24,61)(18,23,68)(21,66,71)(26,37,73)(27,48,60)(28,65,72)
(29,41,62)(33,39,42)(47,50,56);