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.

Q: gvvggvvgvvg

A: gvvggvvg
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Q: ppidipiddpp

A: pidip
****
Q: qcdcqddddqdqc

A:
qddddq
****