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]: oGaGjsaKsUpLQAg, iDGjsaKsUoYGuta
[A]: GjsaKsU


[Q]: LWSzUyzWaGb, iCuNKSzUyzWcJ
[A]:
SzUyzW