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: mjmmjmmmmm

SOLUTION: mjmmjm

PROBLEM: jbjjijijiibj

SOLUTION: jijij

PROBLEM: ykkddkdkkdydydk

SOLUTION:
kdydydk