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

[Q]: QaxEaxdouNyyvNAn, wRjWSaxdouNyyrriQiG
[A]: axdouNyy


[Q]: QvtDqzQiSknPbRCG, hVxHdqzQiSknPbumdpNIf
[A]: qzQiSknPb


[Q]: NMlLjSjzTgmujUJZAEuFQY, JBPJrXAqrlLjSjzTgmuXWG
[A]:
lLjSjzTgmu