return 
[ [ [ 2, 3, 4, 5 ], [ 1, 5, 6, 7 ], [ 10, 10, 1, 7 ], [ 1, 10, 9, 5 ], 
      [ 1, 4, 9, 2 ], [ 2, 9, 8, 7 ], [ 2, 6, 8, 3 ], [ 10, 7, 6, 9 ], 
      [ 4, 8, 6, 5 ], [ 3, 3, 8, 4 ] ], 
  [ [ 9, 10, 3, 4 ], [ 10, 5, 6, 3 ], [ 1, 2, 6, 7 ], [ 1, 7, 8, 5 ], 
      [ 9, 4, 8, 2 ], [ 2, 8, 7, 3 ], [ 3, 6, 8, 4 ], [ 4, 7, 6, 5 ], 
      [ 10, 10, 1, 5 ], [ 9, 9, 2, 1 ] ], 
  [ [ 10, 10, 4, 5 ], [ 10, 5, 6, 7 ], [ 10, 7, 8, 4 ], [ 1, 3, 9, 5 ], 
      [ 1, 4, 9, 2 ], [ 2, 9, 8, 7 ], [ 2, 6, 8, 3 ], [ 3, 7, 6, 9 ], 
      [ 4, 8, 6, 5 ], [ 1, 1, 2, 3 ] ] ];
