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

[Q]: bVlwKYBYmcNq, hBlwKYBprL
[A]: lwKYB


[Q]: Owbiay, exbime
[A]: bi


[Q]: iVEjIXKe, vNxEjIrN
[A]:
EjI