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

[Q]: HHJAHyvNCGmJEljWrjvHOqf, msPVEbNCGmJEljsKRX
[A]: NCGmJElj


[Q]: sJRFPufsaWXNeu, AePufsafc
[A]: Pufsa


[Q]: nqfZBnQLqqbcUZnxs, GthBnQLqqbcUdMIIQfpKn
[A]:
BnQLqqbcU