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]: ttytrtrtytr
[A]: tytrtrtyt


[Q]: sssyyyyysees
[A]: syyyyys


[Q]: wwyyzyzyyywywyy
[A]:
yyzyzyy