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

mmDhYqPJC, qThYqxW
hYq

andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo
lOdIcQMyZ

pHgBXnKk, AlBXniE

BXn