[
  [
    4,
    1,
    5,
    2
  ],
  [
    8,
    3,
    9,
    4
  ],
  [
    16,
    12,
    17,
    11
  ],
  [
    14,
    6,
    15,
    5
  ],
  [
    6,
    16,
    7,
    15
  ],
  [
    19,
    1,
    20,
    22
  ],
  [
    9,
    21,
    10,
    20
  ],
  [
    21,
    11,
    22,
    10
  ],
  [
    18,
    14,
    19,
    13
  ],
  [
    12,
    18,
    13,
    17
  ],
  [
    2,
    7,
    3,
    8
  ]
]

[]