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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 mnemonic_phrase(self, length: int = 12) -> str: """Generate pseudo mnemonic phrase. :param length: Number of words. :return: Mnemonic code. """

        words = self.__words['normal']
        return ' '.join(self.random.choice(words) for _ in range(length))