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: umuccmmuummc

A: cmmuummc
****
Q: pyppydddydp

A: ydddy
****
Q: rrrttrtrer

A:
rttr
****