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

[Q]: XbjDHRCWxdPbhibUKn, SrpuPDHRCWxdPbKPWEXNWbZ
[A]: DHRCWxdPb


[Q]: jexvmCmveGzFUimQMx, RVwOSJveGzFUimrcOwjEwe
[A]: veGzFUim


[Q]: MYBwBIgHIgyThYOjMOrid, nbSNZvpRHIgyThYOjMIIyMGsDFch
[A]:
HIgyThYOjM