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: yynnnyfnynyynyf

SOLUTION: ynyyny

PROBLEM: wvvvwvwhvhhvhvv

SOLUTION: hvhhvh

PROBLEM: nooojojojnno

SOLUTION:
ojojo