def table_name_suffix(load_table_s3_prefix: str) -> str:
    """
    Table name suffix should be '__ct' if the S3 prefix is from change tracking.

    Parameters
    ----------
    load_table_s3_prefix : str
        The load's prefix as determined by its S3 key.

    Returns
    -------
    str
        "__ct" or "" depending on the load's prefix
    """

    return "__ct" if load_table_s3_prefix.endswith("__ct/") else ""