In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Input: Consider Input: andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo

Output: lOdIcQMyZ


Input: Consider Input: HKCoXQsLRtowYJ, PGRzNUQsLRtoLcqkn

Output: QsLRto


Input: Consider Input: BSFIuYRjcyYHLR, XRRjcyYHzuVC


Output: RjcyYH