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

Q: cvRdSsuNwGVEwSSrowDpaOu, gFMcLKIeLwNwGVEwSSroUGskaoloqC

A: NwGVEwSSro
****
Q: zBxuZfJgYrlRSzkmAktO, YNMgYrlRSzklmBOH

A: gYrlRSzk
****
Q: NGJHdT, ffJHVY

A:
JH
****