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.
--------
Question: uzsuzuszuus

Answer: uzsuzuszu


Question: ccnnmncccmcn

Answer: nmn


Question: uxxumummxxxum

Answer:
uxxu