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: wqqwvwwqqvww

A: wqqw
****
Q: lccrlcrclrrlr

A: rlcrclr
****
Q: kzrkzrrkrz

A:
rkr
****