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: pjjjpvppppjjvj

A: pjjjp
****
Q: ushsuhsushuu

A: uhsushu
****
Q: tktkttuuuu

A:
tktkt
****
