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

TizkNtJUPHfhmGQ, enzehVkNtJUPHunpG
kNtJUPH

TdvkBvVyJcSdYGGPfnyml, rIvIvVyJcSdYhtxG
vVyJcSdY

WTnsmP, INnsIM

ns