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

[Q]: xzMUdHcoYJFWLOILjrg, vCscoYJFWLzO
[A]: coYJFWL


[Q]: oCtWZYdkvZ, pkktWZYdEHMW
[A]: tWZYd


[Q]: GJQfHnozCGONBAFllt, oxXaKXXAKJfHnozCGONBNzUtX
[A]:
fHnozCGONB