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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 stem(self, text):
 """Stem a text string to its common stem form."""

        normalizedText = TextNormalizer.normalize_text(text)

        words = normalizedText.split(' ')
        stems = []

        for word in words:
            stems.append(self.stem_word(word))

        return ' '.join(stems)