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

Input: Consider Input: JAfPtjqqUYMD, cpXItjqqFN

Output: tjqq


Input: Consider Input: fVEFJa, WtEFYK

Output: EF


Input: Consider Input: eufGSSltzbe, JDGSSlHzUz


Output: GSSl