def replace_umlauts(text):
    """
    Replaces german umlauts and sharp s in given text.

    :param text: text as str
    :return: manipulated text as str
    """
    res = text
    res = res.replace('ä', 'ae')
    res = res.replace('ö', 'oe')
    res = res.replace('ü', 'ue')
    res = res.replace('Ä', 'Ae')
    res = res.replace('Ö', 'Oe')
    res = res.replace('Ü', 'Ue')
    res = res.replace('ß', 'ss')

    return res