def urbanmain() = {
  import M2._

  val urban_wordle_url = """https://nms.kcl.ac.uk/christian.urban/wordle.txt"""
  val urban_secrets = get_wordle_list(urban_wordle_url)

  assert(urban_secrets.length == 12972)
  assert(urban_secrets.filter(_.length != 5) == Nil)

  assert(get_wordle_list(urban_wordle_url ++ "2") == Nil)
}