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: ggtrtgrrtrgr

A: gtrtg
****
Q: sqqtssqsstqs

A: qtssqsstq
****
Q: ccvvvvvvvccvc

A:
ccvvvvvvvcc
****