def append_str_to(append_to: str, *args, sep=", ", **kwargs):
    """Concatenate to a string.
    Args:
        append_to(str): The string to append to.
        args(list): list of string characters to concatenate.
        sep(str): Seperator to use between concatenated strings.
        kwargs(dict): Mapping of variables with intended string values.
    Returns:
        str, joined strings seperated
    """
    append_to = append_to or ""
    result_list = [append_to] + list(args) + list(kwargs.values())
    return f"{sep}".join(filter(len, result_list))