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

gXwuhXJrEdzGOmLSKdK, TohXJrEdzGavU
hXJrEdzG

RwqzMTeLMdPx, qaWtYhqzMTeLMdHbWDT
qzMTeLMd

lmwrOlpDzhWnCpVUyLNf, QdpboDzhWnCpVUyDYYJX

DzhWnCpVUy