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

Input: Consider Input: jFVaEHbMrrkW, ekfVaEHbPnBnM

Output: VaEHb


Input: Consider Input: WRfFDeZjIcpidmDxtaJcv, XMxWZjIcpidmlKga

Output: ZjIcpidm


Input: Consider Input: wiResRzBAJKVvrDZtOmd, FsGDdSRzBAJKVvrwVwlrOjE


Output: RzBAJKVvr