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

VXSNlHzkB, EoNlHCiL
NlH

SUgXyznbUQRpiLUTlRb, jlnwLTnbUQRpioUFyJ
nbUQRpi

ZHmzNVlorG, mSzNVlPT

zNVl