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]: nweenneewnnn
[EX A]: nweenneewn

[EX Q]: vkvkvukuuvu
[EX A]: vkvkv

[EX Q]: vdddlddldvllv
[EX A]:
dlddld