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

Input: Consider Input: yPODMimvyQPYWHfcM, aZiotMimvyQPZncH

Output: MimvyQP


Input: Consider Input: lPhVhAQZWJDrvzcEaGEwKgZAuJI, qIJDrvzcEaGDRCRrB

Output: JDrvzcEaG


Input: Consider Input: vqKARl, IKKAAu


Output: KA