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

Q: ljwjMioOwfOltGBaE, TneNGsoOwfOlxnWWW

A: oOwfOl
****
Q: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD

A: VLbQhBx
****
Q: qQCQfQWTWAjYlzdo, AqfQWTWAtfiYeT

A:
fQWTWA
****