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

Q: YPeBvuJXaSLLPhKpUQ, ryjPdyuJXaSLLPhIzBeJP

A: uJXaSLLPh
****
Q: lQwpMQRxuVbJDv, UkzwpMQRxuDVT

A: wpMQRxu
****
Q: LWHsjpAKLo, MfUEsjpAXtu

A:
sjpA
****