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

Q: osmJJcZlDAXBgJFsJKa, rzPNlDAXBgJYrgXlH

A: lDAXBgJ
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Q: XEvxzelZaWRO, zXIelZaWBUn

A: elZaW
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Q: KaSWTqWKiZaJXQuOpwV, mIWKiZaJXQuhPH

A:
WKiZaJXQu
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