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: afyaffaafafa

A: afafa
****
Q: cjjjjcjccjjj

A: cjjjjc
****
Q: vbbvvbvvbbbvbvb

A:
bbvvbvvbb
****
