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: dtgddttgtggddt

A: tgt
****
Q: yzyyeezeze

A: ezeze
****
Q: muucumcmmuuc

A:
ucu
****
