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: xxhxhxxhhxx

A: xxhxhxx
****
Q: tcffccffccttcf

A: cffccffc
****
Q: qygygyqyqqygg

A:
qygygyq
****