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

[Q]: MvALRGKkpALcKdhTtnm, neMkRGKkpALcKdcaxnXEPxW
[A]: RGKkpALcKd


[Q]: cvRdSsuNwGVEwSSrowDpaOu, gFMcLKIeLwNwGVEwSSroUGskaoloqC
[A]: NwGVEwSSro


[Q]: xsLHbRaPISlm, GdYERaPISMYNYl
[A]:
RaPIS