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

fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh
xuyBevvLog

dZJWBGoeoMepPoTg, pekBGoeoMeQP
BGoeoMe

FfhSIzzvgJ, sEgSIzzvmhyt

SIzzv