In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
--------
Question: aBlALASwuwTZmy, MdwASwuwIW

Answer: ASwuw


Question: zgJGhxLU, EwJGhedW

Answer: JGh


Question: IzsbtyMsAcAOYJTpPJhE, hnPtyMsAcAOYJkHtgcpo

Answer:
tyMsAcAOYJ