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: yrIDSuVuQU, UXTSuVuLcch

Answer: SuVu


Question: plSfJAktMfac, TCjYJAktlt

Answer: JAkt


Question: bMFkBRSX, adFkBRxbAH

Answer:
FkBR