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

Input: Consider Input: ylyLVUjsmMrXMFAPDGIZsHq, cYymMrXMFAPjm

Output: mMrXMFAP


Input: Consider Input: rqhQxQQDdYwemFiiwcfVx, cEQDdYwemFtwpfNJC

Output: QDdYwemF


Input: Consider Input: sQKIWeZcKAvUJwS, RpIWeZcKAcGYPn


Output: IWeZcKA