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hackerrank.comSet MutationsProblem link : https://www.hackerrank.com/challenges/py-set-mutations/problem?utm_campaign=challenge-recommendation&utm_medium=email&utm_source=24-hour-campaign&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zenDifficulty : Easy TipThis problem is a bit difficultWe can call a method with a name of it, please see getattr() for more detailge..