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

[Q]: SODsrWUjUBSgA, WIWUjUBCUUs
[A]: WUjUB


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


[Q]: himLOJTFoJ, HxJtkLOJTFrV
[A]:
LOJTF