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: koddLvYmRXDUuUnW, GnqDYGmmRXDUuUquAnf

Answer: mRXDUuU


Question: mJoHBJehHtkFS, ZMrDxHBJehHtxS

Answer: HBJehHt


Question: BVNvCfMjcmTGzgnOqfmwtCPdu, UYjcmTGzgnOReqVy

Answer:
jcmTGzgnO