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: yyllyylhyyyl

A: yyllyy
****
Q: slusssllluls

A: sss
****
Q: ppsppnspnp

A:
ppspp
****
