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: dyddyybbbdy

A: yddy
****
Q: bcbrccrrcrcrbc

A: rcrcr
****
Q: ysyysysfyssfff

A:
ysyysy
****