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]: jbjjijijiibj
[A]: jijij


[Q]: gvvggvvgvvg
[A]: gvvggvvg


[Q]: levlleellvvl
[A]:
vlleellv