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

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


[Q]: ZKMRTxCxbsbX, iovHrMRTxCxbsjv
[A]: MRTxCxbs


[Q]: JKTvtIUvEHSwYMIrOfwdF, MwVvtIUvEHSwmK
[A]:
vtIUvEHSw