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

aBlALASwuwTZmy, MdwASwuwIW
ASwuw

pYmzRnGPQVPrqPApKTyvaO, tNGPQVPrqPVTh
GPQVPrqP

oxsINWOdXJNYHAsDXVNzZ, XbaRAUNsOdXJNYHAsDWZwzs

OdXJNYHAsD