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

[Q]: PivhPfah, XSghPfOi
[A]: hPf


[Q]: aBlALASwuwTZmy, MdwASwuwIW
[A]: ASwuw


[Q]: FNjseLT, VlwjseGq
[A]:
jse