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: bbdbbbssbddsdd

A: bbdbb
****
Q: ogoolgogogool

A: gogog
****
Q: jjjmaaajmjjajmm

A:
jjj
****