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]: dddpppddpdpu
[EX A]: ddpppdd

[EX Q]: prprorproor
[EX A]: rprorpr

[EX Q]: xppxxxsssxsxs
[EX A]:
xsssx