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

Input: Consider Input: zeuyZKwvIOfx, BlmZKwvspUt

Output: ZKwv


Input: Consider Input: jXqEDHTCxTiUAICWZJdpmYq, GBTCxTiUAICZKnLgZBXi

Output: TCxTiUAIC


Input: Consider Input: zRCVCOozwaHKHHc, aUVVhOozwaXlMG


Output: Oozwa