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]: momamomommmoao
[EX A]: momamom

[EX Q]: xsjjsjsxjjxsxjj
[EX A]: jjxsxjj

[EX Q]: eteeeeteteeee
[EX A]:
eeeeteteeee