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: tdtedtettddee

A: tdt
****
Q: qssnssnqqnnsnn

A: ssnss
****
Q: yaayygagaagaay

A:
agaaga
****
