instruction:
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:
zeczczcezeeezce
answer:
zeczczcez


question:
vvvffvfuvuufu
answer:
vffv


question:
cdttccdcccccct
answer:

cccccc