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

Q: XpFCxFOgTTNCnQzMnVPV, FMqzdOwgTTNCnQzedorxVPe

A: gTTNCnQz
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Q: cKsJcqYvZO, UrsJcqBC

A: sJcq
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Q: BzkjEgoJGoXJpHvKaInFqn, IGEUtMapuzJGoXJpHvKafetGHuD

A:
JGoXJpHvKa
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