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

[Q]: OgWFOfjNYmXVjBBvOdunIc, eGljKGnzFKFOfjNYmXVjdlqsT
[A]: FOfjNYmXVj


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


[Q]: rSjtKpmTqM, izBetKpmVBr
[A]:
tKpm