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: qjcjcqqqqjjcqq

A: qqqq
****
Q: kmmmmmkkmkm

A: kmmmmmk
****
Q: llklklcclc

A:
lklkl
****