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

UvYbfKFybXofcwLRrLRiK, BgMZKFybXofcVe
KFybXofc

bdCOjNchdKtvWzOI, FwejNchdKhEd
jNchdK

dbhGWP, MUhGxE

hG