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