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: CdRbREFMEDTXnEzgn, zHLEMMEDTXnEPH

Answer: MEDTXnE


Question: zBxuZfJgYrlRSzkmAktO, YNMgYrlRSzklmBOH

Answer: gYrlRSzk


Question: YKpdeJQhzyYiPoODACUu, mjmnIlCehzyYiPoOzZ

Answer:
hzyYiPoO