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

[Q]: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD
[A]: VLbQhBx


[Q]: fREVIdeTcakgFnwDWTVev, IbtXImseeTcakgFnwDYsKBAlux
[A]: eTcakgFnwD


[Q]: mVGJhCsccZrACufHoGJOW, JUCMORIaCsccZrACuGicaxoYL
[A]:
CsccZrACu