In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Q: mRVieYomZqJXaTDsShCyfPW, ifOAlnptmZqJXaTDsVMqY

A: mZqJXaTDs
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Q: XpFCxFOgTTNCnQzMnVPV, FMqzdOwgTTNCnQzedorxVPe

A: gTTNCnQz
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Q: UQDJDbzqDxsMzUL, BxClJDbzqDxLxlngc

A:
JDbzqDx
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