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

[Q]: BVipiZoGXaWdjmDsxWP, yxppsiYkiZoGXaWdjoDRuKW
[A]: iZoGXaWdj


[Q]: spUbdWDLWCeqr, vIuHkWDLWCQEPaz
[A]: WDLWC


[Q]: ZbwKuVgRphNbjhDROXaZ, CXvdfGzphNbjhDROXgVrL
[A]:
phNbjhDROX