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:
jjjojqjqojooqqq
answer:
jjj


question:
pjjjpvppppjjvj
answer:
pjjjp


question:
wkwrwwkrwrrkk
answer:

wkw