return 
[ [ [ 2, 3, 4, 5 ], [ 1, 6, 7, 8 ], [ 1, 8, 9, 10 ], [ 1, 10, 18, 19 ], 
      [ 1, 19, 13, 6 ], [ 2, 5, 14, 15 ], [ 17, 17, 2, 15 ], [ 2, 17, 20, 3 ],
      [ 3, 20, 15, 14 ], [ 3, 14, 11, 4 ], [ 18, 18, 10, 13 ], 
      [ 19, 19, 18, 13 ], [ 5, 12, 11, 14 ], [ 6, 13, 10, 9 ], 
      [ 6, 9, 16, 7 ], [ 20, 20, 17, 15 ], [ 7, 7, 16, 8 ], [ 11, 11, 12, 4 ],
      [ 12, 12, 5, 4 ], [ 16, 16, 9, 8 ] ], 
  [ [ 2, 3, 4, 5 ], [ 1, 6, 7, 8 ], [ 17, 17, 1, 8 ], [ 1, 17, 10, 11 ], 
      [ 1, 11, 12, 6 ], [ 18, 18, 2, 5 ], [ 2, 18, 13, 14 ], [ 2, 14, 9, 3 ], 
      [ 17, 8, 15, 10 ], [ 19, 19, 4, 9 ], [ 4, 19, 16, 5 ], 
      [ 5, 16, 13, 18 ], [ 20, 20, 7, 12 ], [ 7, 20, 15, 8 ], 
      [ 9, 14, 16, 19 ], [ 11, 15, 20, 12 ], [ 3, 3, 9, 4 ], [ 6, 6, 12, 7 ], 
      [ 10, 10, 15, 11 ], [ 13, 13, 16, 14 ] ], 
  [ [ 2, 3, 4, 5 ], [ 17, 17, 1, 6 ], [ 1, 17, 8, 18 ], [ 1, 18, 10, 11 ], 
      [ 1, 11, 12, 6 ], [ 2, 5, 19, 7 ], [ 17, 6, 13, 8 ], [ 3, 7, 14, 9 ], 
      [ 18, 18, 8, 10 ], [ 4, 9, 14, 20 ], [ 4, 20, 16, 5 ], 
      [ 19, 19, 5, 16 ], [ 7, 19, 16, 14 ], [ 8, 13, 15, 10 ], 
      [ 20, 20, 14, 16 ], [ 11, 15, 13, 12 ], [ 2, 2, 7, 3 ], [ 9, 9, 4, 3 ], 
      [ 12, 12, 13, 6 ], [ 15, 15, 11, 10 ] ], 
  [ [ 2, 3, 15, 5 ], [ 1, 6, 7, 8 ], [ 1, 8, 9, 17 ], [ 17, 17, 9, 16 ], 
      [ 1, 16, 9, 6 ], [ 2, 5, 10, 11 ], [ 2, 11, 18, 13 ], [ 2, 13, 10, 3 ], 
      [ 3, 10, 5, 4 ], [ 6, 9, 8, 14 ], [ 6, 14, 20, 7 ], [ 20, 20, 14, 19 ], 
      [ 7, 19, 14, 8 ], [ 10, 13, 12, 11 ], [ 16, 16, 1, 17 ], 
      [ 15, 15, 4, 5 ], [ 4, 4, 15, 3 ], [ 19, 19, 7, 20 ], 
      [ 18, 18, 12, 13 ], [ 12, 12, 18, 11 ] ], 
  [ [ 2, 3, 15, 5 ], [ 1, 6, 7, 8 ], [ 1, 8, 9, 17 ], [ 17, 17, 9, 16 ], 
      [ 1, 16, 9, 6 ], [ 2, 5, 10, 11 ], [ 2, 11, 19, 13 ], [ 2, 13, 10, 3 ], 
      [ 3, 10, 5, 4 ], [ 6, 9, 8, 14 ], [ 6, 14, 12, 7 ], [ 19, 19, 11, 18 ], 
      [ 7, 20, 14, 8 ], [ 10, 13, 18, 11 ], [ 16, 16, 1, 17 ], 
      [ 15, 15, 4, 5 ], [ 4, 4, 15, 3 ], [ 20, 20, 12, 14 ], 
      [ 12, 12, 20, 7 ], [ 18, 18, 13, 19 ] ], 
  [ [ 19, 19, 3, 4 ], [ 19, 19, 4, 3 ], [ 1, 2, 5, 6 ], [ 2, 1, 6, 5 ], 
      [ 3, 4, 7, 8 ], [ 4, 3, 8, 7 ], [ 5, 6, 9, 10 ], [ 6, 5, 10, 9 ], 
      [ 7, 8, 11, 12 ], [ 8, 7, 12, 11 ], [ 9, 10, 13, 14 ], 
      [ 10, 9, 14, 13 ], [ 11, 12, 15, 16 ], [ 12, 11, 16, 15 ], 
      [ 13, 14, 17, 18 ], [ 14, 13, 18, 17 ], [ 15, 16, 20, 20 ], 
      [ 16, 15, 20, 20 ], [ 1, 1, 2, 2 ], [ 18, 18, 17, 17 ] ] ];
