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

[Q]: oZZUNCUHtIiauDxQ, OdindZUNCUHtIiLQmWJJf
[A]: ZUNCUHtIi


[Q]: iMwanJBuMdiZDL, kIafHeBuMdiZmKNA
[A]: BuMdiZ


[Q]: rpQWdSpahUmqera, QhXkOtGGrWdSpahUmqTGRwO
[A]:
WdSpahUmq