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: NTINFnRckGsfLqhSoA, UUONcKKFnRckGsfLqVak

Output: FnRckGsfLq


Input: Consider Input: ewopHxDQIZIrmVjWDq, AWQIZIrmVjWPPMUCGpQg


Output: QIZIrmVjW