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

Q: AeYjeKwZQillzpD, SnqviKwZQillrxuTB

A: KwZQill
****
Q: OVVkkdeHoFlyNROyCP, zFVUJbvkkdeHoFlysF

A: kkdeHoFly
****
Q: HgqdSoLewNwBGFPNPjyi, NnPbNLewNwBGrgXOcIW

A:
LewNwBG
****