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

[Q]: aZcGMvzBhazkCIFqpVe, AOljBvzBhazkWXeTuA
[A]: vzBhazk


[Q]: mXHhaCEIwqwEZcz, JZPXbYHhaCEIwZmna
[A]: HhaCEIw


[Q]: RAQEsuJrNrrabatBc, PMHMCJrNrrabxjZxn
[A]:
JrNrrab