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

[Q]: pIkAtJHVcvzzZVz, btWerNSHVcvzzZTz
[A]: HVcvzzZ


[Q]: dmigbcBoWdAIyaeE, zXiKQFbcBoWdAIyaEypIjJpwbU
[A]: bcBoWdAIya


[Q]: YkXEDuUrcGuXWTAF, cCVUrcGuXWTaW
[A]:
UrcGuXWT