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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 run_reducer(self, stdin=sys.stdin, stdout=sys.stdout):
 """ Run the reducer on the hadoop node. """

        self.init_hadoop()
        self.init_reducer()
        outputs = self._reduce_input(self.internal_reader((line[:-1] for line in stdin)), self.reducer, self.final_reducer)
        self.writer(outputs, stdout)