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

WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu
NrxXeUrKC

eeoJEtGHPDvHck, ezPGHPDvHSf
GHPDvH

CenvnqVv, vyjvnqIcG

vnq