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

[Q]: nFgMXUzpStDAybiwm, aNJrXUzpStDjp
[A]: XUzpStD


[Q]: UvYbfKFybXofcwLRrLRiK, BgMZKFybXofcVe
[A]: KFybXofc


[Q]: VPYgMzMlgnvWMuEEMPcdfG, raGSPzRejEgMzMlgnvWMCqKFwhaGh
[A]:
gMzMlgnvWM