## Group: [64, 267]
## Difference Sets: 4
## Time:  6:34:22.500

return [
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 21, 22, 35, 36, 38, 39, 
  40, 58, 59, 60, 61, 62, 64 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 21, 22, 35, 36, 38, 49, 
  50, 53, 54, 60, 61, 62, 64 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 16, 18, 19, 20, 21, 22, 48, 50, 
  53, 58, 59, 60, 61, 62, 63 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16, 19, 21, 22, 45, 47, 48, 50, 51, 52, 
  53, 58, 59, 60, 61, 62, 63 ]
];

