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: ATmVEtUuZOgsBUuL, UMUuZOgsBPVT

Answer: UuZOgsB


Question: uqDaPS, XyDaMZ

Answer: Da


Question: avknEeLJ, NHnknEtkB

Answer:
knE