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

[Q]: nxoXDohHr, WcbkXDohFbJ
[A]: XDoh


[Q]: kOrQWjLKnwN, xFsWjLKgr
[A]: WjLK


[Q]: vBJooqKJFoeEzTdDm, msHdrDKJFoeEzIzT
[A]:
KJFoeEz