return 
[ [ [ 7, 7, 3, 4 ], [ 7, 9, 6, 3 ], [ 8, 8, 1, 2 ], [ 1, 8, 6, 5 ], 
      [ 9, 9, 7, 4 ], [ 2, 9, 4, 8 ], [ 1, 1, 5, 2 ], [ 3, 3, 6, 4 ], 
      [ 5, 5, 6, 2 ] ], 
  [ [ 9, 9, 3, 4 ], [ 9, 9, 4, 3 ], [ 1, 2, 5, 6 ], [ 2, 1, 6, 5 ], 
      [ 3, 4, 7, 8 ], [ 4, 3, 8, 7 ], [ 5, 6, 8, 8 ], [ 6, 5, 7, 7 ], 
      [ 1, 1, 2, 2 ] ] ];
