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


[Q]: osmJJcZlDAXBgJFsJKa, rzPNlDAXBgJYrgXlH
[A]: lDAXBgJ


[Q]: NEPauJRjUavXWSnrnf, RwuJRjUavXEntRq
[A]:
uJRjUavX