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

[Q]: nFgMXUzpStDAybiwm, aNJrXUzpStDjp
[A]: XUzpStD


[Q]: MSxTzCpiJAplpzSvLlNJS, oScCpiJAplpNVrqkn
[A]: CpiJAplp


[Q]: sbHKEsCWCrWSyDjT, gCRRzdIWCrWSyDVM
[A]:
WCrWSyD