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

[Q]: DnAzbgMtdPKsNCMpBfc, QdfXRkWREzbgMtdPKsGx
[A]: zbgMtdPKs


[Q]: ktABEFESAVHZkkY, uMjxiESAVHZkZgWUte
[A]: ESAVHZk


[Q]: hrICYi, XFICai
[A]:
IC