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

Q: LeHzcEFc, WFzcExvJ

A: zcE
****
Q: fCGEhfHvcRouHzNw, gtjBkhfHvcRouHee

A: hfHvcRouH
****
Q: XAPxkULJNjJSmPTJr, ScxkULJNjZhZN

A:
xkULJNj
****