Answer 1

Nice challenge 👍
I'm late, but here's :
https://code.sololearn.com/cH4YmqHaxFZV/?ref=app

Answer 2

what do you mean by 'it must do this step only once'?
do you mean only 2 characters will be selected and swap in different positions?😦

Answer 3

https://code.sololearn.com/cC4QN31aM9WL/?ref=app

Answer 4

heres mine

only one time swap to make palindrome
prints swapping indices too

https://code.sololearn.com/c890nt0UY3wL/?ref=app

Answer 5

a new challenge...
get refreshed

https://www.sololearn.com/discuss/817002/?ref=app