thanks

yeah thanks i fixed it.
there was one small issue if you have time to help,
that in random test cases my code's output and excpected output didn't match though when i ran code on visual studio
on my local machine it returned the expected output.
any idea what can be the problem?

Expected: equal to "Lets"
Actual: "al***l"

i thought we were suppose to sort them alphabetically.
yes based on ascii values "Lets" comes first, but alphabetically "all" comes first.

can someone clear me which one I should go with?