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

ATmVEtUuZOgsBUuL, UMUuZOgsBPVT
UuZOgsB

eeoJEtGHPDvHck, ezPGHPDvHSf
GHPDvH

yiZJltLQiSNqsTcbdMVA, NvyFmJltLQiSNqsDbr

JltLQiSNqs