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

osmJJcZlDAXBgJFsJKa, rzPNlDAXBgJYrgXlH
lDAXBgJ

OXdSmcKG, XbDdSmJl
dSm

nWmQLyEneNtWxq, tILyEnejOd

LyEne