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