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: asaasasajjasj

A: asaasa
****
Q: aaarrrprrapaar

A: rrprr
****
Q: nvnnnvvvnvvn

A:
vnnnv
****