[
  {
    "input": [[4, 12, 1, 8]],
    "output": [1, 4, 8, 12]
  },
  {
    "input": [[6, 2, 9, 3, 4]],
    "output": [2, 3, 4, 6, 9]
  },
  {
    "input": [[2, 8, 5, 3, 9, 4, 1]],
    "output": [1, 2, 3, 4, 5, 8, 9]
  }
]