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: lllaaulaul

A: lll
****
Q: yyllyylhyyyl

A: yyllyy
****
Q: hvvvhhvvvvhvvv

A:
vvvhhvvv
****
