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

Input: Consider Input: mXHhaCEIwqwEZcz, JZPXbYHhaCEIwZmna

Output: HhaCEIw


Input: Consider Input: mvIvSzMtYsfVLdaGEmef, wnzMtYsfVLdaKm

Output: zMtYsfVLda


Input: Consider Input: MLRpUInBunGrbVZVyVxTvsqWv, uBaNVJglnGrbVZVyVar


Output: nGrbVZVyV