[
    ["", ""],
    ["00", "AA=="],
    ["66", "Zg=="],
    ["666F", "Zm8="],
    ["666F6F", "Zm9v"],
    ["666F6F62", "Zm9vYg=="],
    ["666F6F6261", "Zm9vYmE="],
    ["666F6F626172", "Zm9vYmFy"]
  ]