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

Input: Consider Input: iMwanJBuMdiZDL, kIafHeBuMdiZmKNA

Output: BuMdiZ


Input: Consider Input: nXVXIEGP, fkXIEkU

Output: XIE


Input: Consider Input: oUatuBXLzEHDIGnCFJRe, dyuBXLzEHDbcIrYK


Output: uBXLzEHD