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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 inserted(self, word, hyphen='-'):
 """ Returns the word as a string with all the possible hyphens inserted. E.g. for the dutch word 'lettergrepen' this method returns the string 'let-ter-gre-pen'. The hyphen string to use can be given as the second parameter, that defaults to '-'. """

        l = list(word)
        for p in reversed(self.positions(word)):
            if p.data:
                # get the nonstandard hyphenation data
                change, index, cut = p.data
                if word.isupper():
                    change = change.upper()
                l[p + index : p + index + cut] = change.replace('=', hyphen)
            else:
                l.insert(p, hyphen)
        return ''.join(l)