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


[Q]: LudFxiaqbX, UWMPnFxiaqikiDx
[A]: Fxiaq


[Q]: xgqVagMdrLQjVoEVREClI, DZiFzqgMdrLQjVpfXA
[A]:
gMdrLQjV