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

Input: Consider Input: HKqfdEvqDuGhWByFlzIEeYh, VVaZfkLCMuGhWByFlzIOZaXbMCA

Output: uGhWByFlzI


Input: Consider Input: skZGHS, HsZGge

Output: ZG


Input: Consider Input: crLeHjxlgfzHyE, VXpoLeHjxlgfVL


Output: LeHjxlgf