def break_apl_net(apl: str) -> str:
    """
    Pull APL entry apart, returning IPv4 or IPv6 nugget with mask
    """
    try:
        ind = apl.find(":")
    except Exception:
        ind = -1
    if ind >= 0:
        (ipver, remainder) = apl.split(":", 1)
        return remainder
    else:
        return apl