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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 dependencies(self):
 """ The number of extra rows needed for each of our inputs to compute this term. """

        extra_input_rows = max(0, self.window_length - 1)
        out = {}
        for term in self.inputs:
            out[term] = extra_input_rows
        out[self.mask] = 0
        return out