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]: IQIHqbEhpVuNATp, GIJIHqbEhpzWb
[A]: IHqbEhp


[Q]: XayjWMJIhCsCcmHrje, nZJIhCsCCkZG
[A]:
JIhCsC