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: YcgVJVACcQE, JsJVACcSz

Answer: JVACc


Question: XHqQIPw, brqQIkAt

Answer: qQI


Question: XXdypRTCYTBq, pPOdypRTCYsjrjk

Answer:
dypRTCY