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

Q: zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv

A: dAdXQfQCAm
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Q: libDFDxIgRiglWfxMVRr, yMltDxIgRiglpms

A: DxIgRigl
****
Q: AZcAYjYYwlSaiQkzo, dTZMbLZVDAYjYYwlSaiXhLJHj

A:
AYjYYwlSai
****