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

dZJWBGoeoMepPoTg, pekBGoeoMeQP
BGoeoMe

yxJxNRLEnKGHziJtfb, KfReWhEnKGHzitzfPWzK
EnKGHzi

ATUVWSHJ, qTyUVWbX

UVW