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: mOGzbnDXWnNurkBXtcqZ, NLahGzbnDXWnNYgMTOR

Answer: GzbnDXWnN


Question: nhGinCtvLartcMPhJwGRbpZNrq, iQJlFKayEartcMPhJwDRROB

Answer: artcMPhJw


Question: eRAWrCmD, EEiAWrqx

Answer:
AWr