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permute

Language/Type: Java backtracking recursion
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Write a recursive method named permute that accepts a string as a parameter and outputs all possible rearrangements of the letters in that string. The arrangements may be output in any order. For example, the call of permute("ABC"); should print:

ABC
ACB
BAC
BCA
CAB
CBA

If the string passed is empty, print no output. Your method must use recursion, but you can use a single for loop if necessary.

Method: Write a Java method as described, not a complete program or class.

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