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

[Q]: yjoJzBGdwfOhsceoOpoap, uSLMdBGdwfOhsIQHBijd
[A]: BGdwfOhs


[Q]: tGBRASi, QABRAtL
[A]: BRA


[Q]: hGgjsr, YHgjUv
[A]:
gj