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

Input: Consider Input: WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu

Output: NrxXeUrKC


Input: Consider Input: DhhYhrqVMXSoyvXQwqPKzWARAP, CaMXSoyvXQwqcDDtMsVqD

Output: MXSoyvXQwq


Input: Consider Input: vHtgETSi, TPYgEToJN


Output: gET