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

[Q]: NwmTIZSnlKGG, qAYIZSnfWRd
[A]: IZSn


[Q]: bdCOjNchdKtvWzOI, FwejNchdKhEd
[A]: jNchdK


[Q]: dPzitZ, FZziPC
[A]:
zi