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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __cyrillic_to_roman(self, word):
 """ Transliterate a Russian word into the Roman alphabet. A Russian word whose letters consist of the Cyrillic alphabet are transliterated into the Roman alphabet in order to ease the forthcoming stemming process. :param word: The word that is transliterated. :type word: unicode :return: the transliterated word. :rtype: unicode :note: This helper method is invoked by the stem method of the subclass RussianStemmer. It is not to be invoked directly! """

        word = (word.replace("\u0410", "a").replace("\u0430", "a")
                    .replace("\u0411", "b").replace("\u0431", "b")
                    .replace("\u0412", "v").replace("\u0432", "v")
                    .replace("\u0413", "g").replace("\u0433", "g")
                    .replace("\u0414", "d").replace("\u0434", "d")
                    .replace("\u0415", "e").replace("\u0435", "e")
                    .replace("\u0401", "e").replace("\u0451", "e")
                    .replace("\u0416", "zh").replace("\u0436", "zh")
                    .replace("\u0417", "z").replace("\u0437", "z")
                    .replace("\u0418", "i").replace("\u0438", "i")
                    .replace("\u0419", "i`").replace("\u0439", "i`")
                    .replace("\u041A", "k").replace("\u043A", "k")
                    .replace("\u041B", "l").replace("\u043B", "l")
                    .replace("\u041C", "m").replace("\u043C", "m")
                    .replace("\u041D", "n").replace("\u043D", "n")
                    .replace("\u041E", "o").replace("\u043E", "o")
                    .replace("\u041F", "p").replace("\u043F", "p")
                    .replace("\u0420", "r").replace("\u0440", "r")
                    .replace("\u0421", "s").replace("\u0441", "s")
                    .replace("\u0422", "t").replace("\u0442", "t")
                    .replace("\u0423", "u").replace("\u0443", "u")
                    .replace("\u0424", "f").replace("\u0444", "f")
                    .replace("\u0425", "kh").replace("\u0445", "kh")
                    .replace("\u0426", "t^s").replace("\u0446", "t^s")
                    .replace("\u0427", "ch").replace("\u0447", "ch")
                    .replace("\u0428", "sh").replace("\u0448", "sh")
                    .replace("\u0429", "shch").replace("\u0449", "shch")
                    .replace("\u042A", "''").replace("\u044A", "''")
                    .replace("\u042B", "y").replace("\u044B", "y")
                    .replace("\u042C", "'").replace("\u044C", "'")
                    .replace("\u042D", "e`").replace("\u044D", "e`")
                    .replace("\u042E", "i^u").replace("\u044E", "i^u")
                    .replace("\u042F", "i^a").replace("\u044F", "i^a"))


        return word