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

[Q]: SsshKSaCuNzXzSTgVc, DNNYLWahKSaCuNzXnAjtq
[A]: hKSaCuNzX


[Q]: YKpdeJQhzyYiPoODACUu, mjmnIlCehzyYiPoOzZ
[A]: hzyYiPoO


[Q]: UdIFHBXgIMkyQkMU, RoUuHBXgIMFfelJA
[A]:
HBXgIM