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: TnbLNKnNSs, NhDLNKnNRd

Answer: LNKnN


Question: XbjDHRCWxdPbhibUKn, SrpuPDHRCWxdPbKPWEXNWbZ

Answer: DHRCWxdPb


Question: uXuseHNcmyOpjnYqpY, dxHlFNTeHNcmyOpCAt

Answer:
eHNcmyOp