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

[Q]: uZSRkFDHsGXNMaggxUn, lTrQKKpsGXNMaggEdSrEX
[A]: sGXNMagg


[Q]: RAmKlEAUfWcgF, ZlWfEAUfWvVRa
[A]: EAUfW


[Q]: BAhylUMuxjcujukwYWhDeMV, wGkxjcujukwYWuYzFfDFL
[A]:
xjcujukwYW