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.
--------
Question: yyiikiiikiyy

Answer: ikiiiki


Question: lbqlblbbqbbql

Answer: bbqbb


Question: ypypwwwypwypp

Answer:
ypy