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topic description
Given a string S containing only uppercase English letters, you are required to give the number of all the different permutations of S rearranged.
For example: S is ABA, then there are three different permutations: ABA, AAB, and BAA.
enter description
Enter a string S whose length does not exceed 10, and we ensure that it is all uppercase.
output description
Output all the different permutations of S rearrangement (including itself).