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: uZSRkFDHsGXNMaggxUn, lTrQKKpsGXNMaggEdSrEX

Answer: sGXNMagg


Question: gfDDsblwUryUw, UWaRisblwUTqTM

Answer: sblwU


Question: DoCMukeoAWVdtfBTOlm, CIAWVdtfBTur

Answer:
AWVdtfBT