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

[Q]: KKrCLvJKRoyV, WDeLvJKCBdS
[A]: LvJK


[Q]: RGImMTISYdkjzMO, pmyfpImMTISYdatLBBFr
[A]: ImMTISYd


[Q]: uzAwnsDXDuD, XhWnsDXDCRKe
[A]:
nsDXD