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]: lOedgdw, aoedgpn
[A]: edg


[Q]: tZZOGjLCCgcOmptKXog, xKtCgcOmptKNLGDj
[A]:
CgcOmptK