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]: wCfNCfxvLRAxBstRTwMSqTn, AhwxfFNCfxvLRAxBrNtf
[A]: NCfxvLRAxB


[Q]: LfxCnspIXbSygqYScqHFWW, mwLixXbSygqYScqBPnZ
[A]:
XbSygqYScq