Please guide me how to change the recursive call to get the desired output

#1
#2

iterate from end to start instead of start to end.
and append character to the start of previously constructed string.

or do this->

#3

This is omitting the last character and even then answer(subsequences) is not in the required format

#4

ok then try other solution that i shared (the logic is already covered in ur course).

#5

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