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: wwwdwdwwddwww

A: wwdwdww
****
Q: gnfnggnfgngfgn

A: fnggnf
****
Q: krakkkkkraarr

A:
kkkkk
****