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: ncaaanaancacac

A: aanaa
****
Q: fnnfknnfnfkf

A: fnnf
****
Q: fbzzbzbbfz

A:
bzzb
****