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

IobjElBjKvpepE, kRulBjKvvxU
lBjKv

pIkAtJHVcvzzZVz, btWerNSHVcvzzZTz
HVcvzzZ

oAWVFpfKiIo, XSHVFpfVCep

VFpf