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

[Q]: jdLbZSCzaAHGbNwILGmudOH, RdIPuEYJvUZSCzaAHGbNduLToRC
[A]: ZSCzaAHGbN


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


[Q]: XBTCzJyWbsVqu, bKfdJyWbsVTDucUX
[A]:
JyWbsV