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

Q: HorIyjpfBFmKZQUIEoP, AcWOaOgVPmyjpfBFmKZQPFYiI

A: yjpfBFmKZQ
****
Q: IzwlZDJSEFPxfIud, xwWSYwlZDJSEFPbvSXTlS

A: wlZDJSEFP
****
Q: drFSahRxWzYCm, orxQNhRxWzKzXaw

A:
hRxWz
****