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

[Q]: biAihydBoNlzR, IAloNhydBolwUz
[A]: hydBo


[Q]: UldKHMpUYADGfEUGcSon, nPHMpUYADGfEKqHCLPmL
[A]: HMpUYADGfE


[Q]: UBBhalYSsJ, KCjwBhalYOKk
[A]:
BhalY