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]: nweenneewnnn
[A]: nweenneewn


[Q]: xexeeeeeeeexeee
[A]: exeeeeeeeexe


[Q]: nnppnpnnppnn
[A]:
nnppnn