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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 reMutualReceptions(self, idA, idB):
 """ Returns ruler and exaltation mutual receptions. """

        mr = self.mutualReceptions(idA, idB)
        filter_ = ['ruler', 'exalt']
        # Each pair of dignities must be 'ruler' or 'exalt'
        return [(a,b) for (a,b) in mr if (a in filter_ and b in filter_)]