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

[Q]: ATmVEtUuZOgsBUuL, UMUuZOgsBPVT
[A]: UuZOgsB


[Q]: haOsaSQcyodWhqQaC, BKLEUQcyodWhvVkmxBz
[A]: QcyodWh


[Q]: YDTbmXAYMNGwEoCLCjf, hOXAYMNGwJhH
[A]:
XAYMNGw