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

[Q]: oUEcuLINTDdvdOne, thzWccuLINTDQfNZwH
[A]: cuLINTD


[Q]: FQAznAuFjoBKRKB, hPmtFFPnuAznAuFjoBKTgkeJyjcd
[A]: AznAuFjoBK


[Q]: GzhtwZDxqrg, bTRSwZDxMn
[A]:
wZDx