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: xwwwwwzxzww

A: wwzxzww
****
Q: qiifffqfqiffff

A: ffff
****
Q: wvviiwviiiwi

A:
iii
****
