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

Input: Consider Input: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD

Output: VLbQhBx


Input: Consider Input: qQkmYsYN, UhkmYHSy

Output: kmY


Input: Consider Input: CKiRSDmUmXoRJaxAp, BalWDFiZUmXoRJaxzVfK


Output: UmXoRJax