def METHOD_NAME(s):
    """
    Help fuzzy matcher by "normalising" string data.
    :param s: string to be cleaned
    :return: the cleaned string
    """
    if not s:
        return None
    s = s.upper()
    converted_word = ""
    for char in s:
        if char in NSI.replace_table:
            replace_char = NSI.replace_table[char]
        else:
            replace_char = char
        if replace_char:
            converted_word += replace_char
    return converted_word