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

[Q]: sRTQgRgRUjEooapKdR, vzsBgRUjEooLBkYeH
[A]: gRUjEoo


[Q]: LiiFMMLGfNHVnnga, beXMMLGfNHVsjdfdN
[A]: MMLGfNHV


[Q]: UVCDozIFCavy, issOzIFCacaCk
[A]:
zIFCa