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

[Q]: pBDnbfrAxJfVhPBxheXZGp, LMtorAxJfVhPnnaed
[A]: rAxJfVhP


[Q]: GlAYDsKQoXy, IxDsKQuK
[A]: DsKQ


[Q]: shwBTOwrLXI, xBvTOwrpy
[A]:
TOwr