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

[Q]: OgWFOfjNYmXVjBBvOdunIc, eGljKGnzFKFOfjNYmXVjdlqsT
[A]: FOfjNYmXVj


[Q]: JzbEpAquDJFKcNvEWZxVqRV, PFiJlpAquDJFKcNcqOpMeAv
[A]: pAquDJFKcN


[Q]: tEWNnY, GDWNJt
[A]:
WN