Some test cases failing

#1

Whenever I am removing the swap which is the main line to backtrack it is passing all test cases. I cannot understand the reason behind it.

#2

u also h to print it lexographically

#3

so should i store all these in a set and then print it?

#4

u can do this use a set or a map but try to do without these just u have to sort the string u got after permuted

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#5

Sort the string i permuted , what do you mean by this?

#6

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#7

I have a doubt in a tree question kindly check it its urgent