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

Q: yxJxNRLEnKGHziJtfb, KfReWhEnKGHzitzfPWzK

A: EnKGHzi
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Q: KKrCLvJKRoyV, WDeLvJKCBdS

A: LvJK
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Q: ZGkBNEDRAwURXnxBIOJkzTvg, HMAwURXnxBMfGbPOBf

A:
AwURXnxB
****