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

[Q]: wbdHVigIkjNkuAmbr, iSgIkjNkQYyn
[A]: gIkjNk


[Q]: rduIwWNGM, AJqYIwWNaCap
[A]: IwWN


[Q]: vGbbnTntXJKTM, NHhbnTntXEdP
[A]:
bnTntX