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: mQvintdwLUpClREgxv, rYnoXBtdwLUpClRwxsqX

Answer: tdwLUpClR


Question: rqhQxQQDdYwemFiiwcfVx, cEQDdYwemFtwpfNJC

Answer: QDdYwemF


Question: PShMbsbexXGlpBuMMDZZS, sVqGxSexXGlpBxuHXoI

Answer:
exXGlpB