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

Input: Consider Input: CiTNsbepy, DFNsbeZl

Output: Nsbe


Input: Consider Input: MSzHyOuaJILkeY, eUibEHoHyOuaJIhfvXy

Output: HyOuaJI


Input: Consider Input: zqmuYxFKODeP, jgeTlmuYxFOtg


Output: muYxF


