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

Input: Consider Input: pqFpUjQGiofBOjfYkRW, pQMnCFlhFpUjQGiofbc

Output: FpUjQGiof


Input: Consider Input: NxgzLSzFGa, JvLzLSzsuj

Output: zLSz


Input: Consider Input: JagbEOYp, CgugbEXh


Output: gbE