def _scoring_helper(scoring):
    """
    Take a scoring system (either 'ppr', 'half', 'std') and return the correct
    FFC URL fragment.

    Note: helper functions are often prefixed with _, but it's not required.
    """
    if scoring == 'ppr':
        return '/ppr'
    elif scoring == 'half':
        return '/half-ppr'
    elif scoring == 'std':
        return '/standard'