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

[Q]: CiElmOvTqJGVJkfSaDRzE, EjDJwMyxTvTqJGVJkfluB
[A]: vTqJGVJkf


[Q]: PzXzvmYrlGZgOBk, iKnzvmYrlGZgOrs
[A]: zvmYrlGZgO


[Q]: jRaKwleYmBscagP, qLlQxKwleYmBCbr
[A]:
KwleYmB