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: wlFcxOHoXC, IWFcxOIWTk

Answer: FcxO


Question: MriFNpGM, yaiFNduk

Answer: iFN


Question: dfqiZfprxrpQnlnGakemv, ASQVtxrpQnlnGaDX

Answer:
xrpQnlnGa