def build_cz_text(cz_data, prefix):
    """
    Create a summary of Conflict Zone activity
    """
    if cz_data == {}: return ""
    text = ""

    if 'l' in cz_data and cz_data['l'] != '0' and cz_data['l'] != '': text += f"{cz_data['l']}xL "
    if 'm' in cz_data and cz_data['m'] != '0' and cz_data['m'] != '': text += f"{cz_data['m']}xM "
    if 'h' in cz_data and cz_data['h'] != '0' and cz_data['h'] != '': text += f"{cz_data['h']}xH "

    if text != '': text = f".{prefix} {text}"
    return text