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: zBxuZfJgYrlRSzkmAktO, YNMgYrlRSzklmBOH

A: gYrlRSzk
****
Q: PMpjNJCA, VeLpjNJhlfl

A:
pjNJ
****