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

Input: Consider Input: jexvmCmveGzFUimQMx, RVwOSJveGzFUimrcOwjEwe

Output: veGzFUim


Input: Consider Input: PGjDRPDzGaBR, rpIJRPDzWi

Output: RPDz


Input: Consider Input: mlFEWndClhuIxXcoQ, HjSTbdoFEWndClhurgjnui


Output: FEWndClhu