def udom83(text: str) -> str:
    """
    Udom83 - It's a Thai soundex rule.

    :param str text: Thai word
    :return: Udom83 soundex
    """

    if not text or not isinstance(text, str):
        return ""

    text = _RE_1.sub("ัน\\1", text)
    text = _RE_2.sub("ั\\1", text)
    text = _RE_3.sub("ัน\\1", text)
    text = _RE_4.sub("ัน", text)
    text = _RE_5.sub("\\1", text)
    text = _RE_6.sub("\\1ย", text)
    text = _RE_7.sub("ม\\1", text)
    text = _RE_8.sub("ม", text)
    text = _RE_9.sub("ม", text)
    text = _RE_10.sub("", text)
    text = _RE_11.sub("", text)

    if not text:
        return ""

    sd = text[0].translate(_TRANS1)
    sd += text[1:].translate(_TRANS2)

    return (sd + "000000")[:7]
Udom83 - It's a Thai soundex rule.

    :param str text: Thai word
    :return: Udom83 soundex