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

[Q]: oZZUNCUHtIiauDxQ, OdindZUNCUHtIiLQmWJJf
[A]: ZUNCUHtIi


[Q]: NmtypJ, tQtyZD
[A]: ty


[Q]: JZVcWbvBhPCkMiOOCY, jHqXnbvBhPCkvckYHty
[A]:
bvBhPCk