itertools.permutations()

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    1. from itertools import permutations
      1. a,b = (input().upper()).split()
    2. b = int(b)
    3. a = "".join(sorted(a)) # return a string in lexicographic order
    4. ans = list(permutations(a,b))
    5. for i in ans:
    6. list(i)
    7. print("".join(i))