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

uqazNuZhdJhw, KbnrzNuZhBdp
zNuZh

eedZoMwKgDhdsgs, kMMwKgDLm
MwKgD

yOfhMIWZdp, cAfhMILD

fhMI