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: IIbJjQKWaoGKHGgWPcy, uNoMWaoGKHGqbnjmYQ

A: WaoGKHG
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Q: xYlFmuRJIGKNrAzfzjlywJS, hfFmuRJIGKNrWWYhynYnfn

A:
FmuRJIGKNr
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