def prettify(paradigms):
    """utility function. pretty print.
    """
    for num, paradigm in enumerate(paradigms, start=1):
        pos, li_ending_and_form = paradigm
        print('=' * 20, num, '=' * 20)
        print('POS =', pos)
        for ending, form in li_ending_and_form:
            print('• ending = {} form = {}'.format(ending, form))
        print()
