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: rduIwWNGM, AJqYIwWNaCap

Answer: IwWN


Question: AxRSlkQfWHrdlgQG, iXIOrmlkQfWHTy

Answer: lkQfWH


Question: luDuweLHQhYzonNcOf, HxMBhLHQhYzonNmwHrOx

Answer:
LHQhYzonN