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

Q: WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu

A: NrxXeUrKC
****
Q: IIbJjQKWaoGKHGgWPcy, uNoMWaoGKHGqbnjmYQ

A: WaoGKHG
****
Q: JFNSOgmDzxS, cwiOgmDQUd

A:
OgmD
****