Given positive integers n and r, list all the r-permutations, with repetition allowed, of the set {1, 2, 3, . . . , n}   " Develop a mini calculator using Python that could allow a user to enter the input r and n and the calculator would shows the output. Your calculator must based on questions above. WITHOUT using itertools Example if user input n = 3 and r = 2. the answer will display the list  1,1 1,2 1,3 2,1 2,2 2,3 3,1 3,2

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