def METHOD_NAME(self, prefix: str) -> str:
    """Collect all Unicode strings starting with a specific prefix.
    Args:
        prefix: The specific prefix.
    Returns:
        punctuation: The join result of all Unicode strings starting
          with a specific prefix.
    """
    punctuation = "".join(
        six.unichr(x) for x in range(sys.maxunicode) if unicodedata.category(six.unichr(x)).startswith(prefix)
    )
    return punctuation