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

Q: wkVVZREWhcSCpvCTB, ZQWhcSCpvCDVUY

A: WhcSCpvC
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Q: krnkpodgfpCKtfCqyzUbymWbxi, DydgSWpCKtfCqyzDaMsjqc

A: pCKtfCqyz
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Q: zGouRWHv, PUouRWgEfz

A:
ouRW
****