for current_hour in range(0, 24):
    print("На часах " + str(current_hour) + ":00.")
    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!')