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

[Q]: TizkNtJUPHfhmGQ, enzehVkNtJUPHunpG
[A]: kNtJUPH

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

[Q]: YRZKpGz, PXDZKpne
[A]:
ZKp