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