if 22 < current_hour:
        print('Доброй ночи!')
    elif 17 < current_hour:
        print('Добрый вечер!')
    elif 11 < current_hour:
        print('Добрый день!')
    elif 5 < current_hour:
        print('Доброе утро!')
    else:
        print('Доброй ночи!')