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: nnsntstttt

A: tttt
****
Q: vvwwviiiiwwv

A: vwwv
****
Q: cccccqdqqccqd

A:
ccccc
****