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]: fCGEhfHvcRouHzNw, gtjBkhfHvcRouHee
[A]: hfHvcRouH


[Q]: pNhRJoeBF, LPqBhRJoesRG
[A]:
hRJoe