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

Input: Consider Input: egYXVtCPvWxP, VMOolyVtCPvWjIx

Output: VtCPvW


Input: Consider Input: hUpEbyvEcQ, dHpEbyvEvwsXcN

Output: pEbyvE


Input: Consider Input: KpdxIKViQOlcAX, cLqVdxIKViQOlcNiKLkyAdV


Output: dxIKViQOlc