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]: ZhHtTXaUmsQfUMNrnt, KvvebSXaUmsQfBspwM
[A]: XaUmsQf


[Q]: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY
[A]:
COoLMp