return 
[ [ [ 2, 3, 4, 5 ], [ 11, 11, 1, 12 ], [ 1, 11, 7, 13 ], [ 1, 13, 9, 10 ], 
      [ 12, 12, 1, 10 ], [ 11, 12, 10, 7 ], [ 3, 6, 14, 8 ], [ 13, 13, 7, 9 ],
      [ 14, 14, 4, 8 ], [ 4, 14, 6, 5 ], [ 2, 2, 6, 3 ], [ 5, 5, 6, 2 ], 
      [ 8, 8, 4, 3 ], [ 9, 9, 7, 10 ] ], 
  [ [ 13, 13, 3, 4 ], [ 13, 13, 4, 3 ], [ 1, 2, 5, 6 ], [ 2, 1, 6, 5 ], 
      [ 3, 4, 7, 8 ], [ 4, 3, 8, 7 ], [ 5, 6, 9, 10 ], [ 6, 5, 10, 9 ], 
      [ 7, 8, 11, 12 ], [ 8, 7, 12, 11 ], [ 9, 10, 14, 14 ], 
      [ 10, 9, 14, 14 ], [ 1, 1, 2, 2 ], [ 12, 12, 11, 11 ] ] ];
