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