‘liusuyi’
2023-10-08 ab0c571989be18229f3645f81688b673e26216c9
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[
  {
    "a": "000f",
    "b": "f0ff",
    "expected": "f0f0"
  },
  {
    "a": "000f0f",
    "b": "f0ff",
    "mutated": "f0f00f",
    "expected": "f0f0"
  },
  {
    "a": "000f",
    "b": "f0ffff",
    "expected": "f0f0"
  },
  {
    "a": "000000",
    "b": "000000",
    "expected": "000000"
  }
]