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

Input: Consider Input: PShMbsbexXGlpBuMMDZZS, sVqGxSexXGlpBxuHXoI

Output: exXGlpB


Input: Consider Input: AuSFmN, crSFXM

Output: SF


Input: Consider Input: jDgVQDEAMimO, odgVQDEAMiJaSeRt


Output: gVQDEAMi