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

Q: txJhzNeBj, qLJhzNesV

A: JhzNe
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Q: iwSQnplQZFbXQ, lHWnplQZFzswgU

A: nplQZF
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Q: rFIldeODosDVgVoBHMOiCQCmu, FUNHygemQODosDVgVoBlI

A:
ODosDVgVoB
****