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]: prprorproor
[EX A]: rprorpr

[EX Q]: zetezetzeze
[EX A]: zetez

[EX Q]: yyhhhhryyrrrr
[EX A]:
hhhh