[
  "hel",
  [
    "hello",
    "help",
    "helmet"
  ],
  [
    "",
    "",
    ""
  ],
  [
    "https://en.wiktionary.org/wiki/hello",
    "https://en.wiktionary.org/wiki/help",
    "https://en.wiktionary.org/wiki/helmet"
  ]
]