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

Input: Consider Input: VRXUhOYfTul, JqZUhOYKq

Output: UhOY


Input: Consider Input: EeUODjkxsQeTSNsHYpBKIUvEuAKhB, SrpZeTSNsHYpBKdhPFlgMh

Output: eTSNsHYpBK


Input: Consider Input: HHJAHyvNCGmJEljWrjvHOqf, msPVEbNCGmJEljsKRX


Output: NCGmJElj