How can permutations be obtained using fewer recursive steps to find identical strings?

edit

One way to obtain permutations using fewer recursive steps is to remove duplicates before generating the permutations. This can be done by first converting the string into a set of unique characters, and then generating the permutations of the unique characters. To generate the permutations of the original string, we can then insert the duplicates at all possible positions in each permutation of the unique characters. This approach eliminates the need to recursively generate permutations of identical characters, reducing the number of recursive steps required to obtain the final result.