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

Input: Consider Input: IVnbnqBqdPcXfHotUzCYoaGQy, PAlyypBRRBqdPcXfHotpZs

Output: BqdPcXfHot


Input: Consider Input: XEvxzelZaWRO, zXIelZaWBUn

Output: elZaW


Input: Consider Input: kpnjlnAJVQ, PToRnjlnbM


Output: njln