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

Input: Consider Input: EeUODjkxsQeTSNsHYpBKIUvEuAKhB, SrpZeTSNsHYpBKdhPFlgMh

Output: eTSNsHYpBK


Input: Consider Input: wLLwjL, arLwXm

Output: Lw


Input: Consider Input: WFAPUCgVYbmZiFlacUzyv, xQFiekrgPUCgVYbmZUEtl


Output: PUCgVYbmZ