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

Q: aWshKwEuYBBdSwIAyXw, wfVuYBBdSwIAseTxR

A: uYBBdSwIA
****
Q: LJJvLTK, jpFJvLqh

A: JvL
****
Q: KjQjnoXZETKgQWIEjyLTAXM, bcETKgQWIEKRoneZL

A:
ETKgQWIE
****