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

OezHeoe, ouUzHemU
zHe

vMsEJRoLkWcmkuwNRz, ZmoLkWcmVZiBv
oLkWcm

kuyTdtKin, NbmyTdtuec

yTdt