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

Answer: lwKYB


Question: JKZiYILNeNQbJyznES, PHKILNeNQbJylltYH

Answer: ILNeNQbJy


Question: unkPUyLxMIyGC, siNvZufkPUyLxMlfFn

Answer:
kPUyLxM