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

Input: Consider Input: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY

Output: COoLMp


Input: Consider Input: aIZIsqL, wxSZIsEnO

Output: ZIs


Input: Consider Input: wRGTgMSjkwKZFlb, iDGTgMSjkGjNn


Output: GTgMSjk