In this task you will be given a string and you should find the longest substring that is a palindrome. A palindrome is a string that is the same backwards as it is forwards. If the shortest possible palindrome is length 1 you should return the first character.

[Q]: fpffftpffft
[A]: fpf


[Q]: smsmggggsmsmsms
[A]: smsmsms


[Q]: wxwxooooooox
[A]:
xooooooox