TASK DEFINITION: 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.
PROBLEM: mmmfofmfmfmfo

SOLUTION: ofmfmfmfo

PROBLEM: xjxkjjxkjjxx

SOLUTION: xjx

PROBLEM: zhhhgzzzhz

SOLUTION:
hhh