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

[Q]: sOSXbnluNuvwMETKda, JzXbnluNuvyeVHO
[A]: XbnluNuv


[Q]: GFhJafTV, waHhJaji
[A]: hJa


[Q]: jVLEMJxYbjoNnOsuQAobMc, OnbjoNnOsuQAHdPBZpwH
[A]:
bjoNnOsuQA