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

Q: DFRoMPNDAzNgtLsEPseOzC, qykyPjDAzNgtLsEPYTsNrJaNK

A: DAzNgtLsEP
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Q: eNuawupVqQ, RIawuplUIf

A: awup
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Q: lVeoqgUziUJmvnnphc, DROtgUziUJmvnnbgPOyHTAt

A:
gUziUJmvnn
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