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: EOacPYivmmUlYenynBqAwx, MoZWMOeXmUlYenynBEendWg

Output: mUlYenynB


Input: Consider Input: TZbWqOAaLDz, XWSWLWqOAahtuWa


Output: WqOAa