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: xjxkjjxkjjxx

A: xjx
****
Q: rrrrrpprrrrp

A: rrrrpprrrr
****
Q: vvcbcvcvbccbcc

A:
vcbcv
****