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

Input: Consider Input: nTAXUw, OWAXYU

Output: AX


Input: Consider Input: CwTYJWQbzEZkvcqKn, hBnhJWQbzEZkKmVM

Output: JWQbzEZk


Input: Consider Input: KCSLNyiEj, fGDfLNyieg


Output: LNyi