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:
blbljbjjll
answer:
blb


question:
mmeeppepem
answer:
eppe


question:
ddvivdvidvivvii
answer:

dvivd