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]: uzujujzuzuuzuzu
[A]: zuzuuzuz


[Q]: wwwwwiwwwi
[A]: wwwiwww


[Q]: qqygyygyyg
[A]:
gyygyyg