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

Input: Consider Input: OezHeoe, ouUzHemU

Output: zHe

Input: Consider Input: yQRDycTycwH, ImycTycrR

Output: ycTyc

Input: Consider Input: EOacPYivmmUlYenynBqAwx, MoZWMOeXmUlYenynBEendWg
Output: mUlYenynB