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

[Q]: XMtSwZVAHsNYhbyDm, asAVAHsNYhSPuNLrV
[A]: VAHsNYh


[Q]: yiKkIxbKvNk, znaIxbKggg
[A]: IxbK


[Q]: ssFwlKeASEFsT, eaQeAbwlKeASEys
[A]:
wlKeASE