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

[Q]: fdinRdwwlntwqzYGhV, ZefonRdwwlntoWQbh
[A]: nRdwwlnt


[Q]: CwTYJWQbzEZkvcqKn, hBnhJWQbzEZkKmVM
[A]: JWQbzEZk


[Q]: ogzjrhFzrvsmYjdXykuaDcRF, xwrhFzrvsmYjEb
[A]:
rhFzrvsmYj