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.

[EX Q]: wwqjjjjwwwwqqq
[EX A]: jjjj

[EX Q]: iiikrriikrrki
[EX A]: ikrrki

[EX Q]: ffmfmjjfffff
[EX A]:
fffff