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.

[EX Q]: lllaaulaul
[EX A]: lll

[EX Q]: afyaffaafafa
[EX A]: afafa

[EX Q]: kjkffffjkkjkjf
[EX A]:
ffff