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

TizkNtJUPHfhmGQ, enzehVkNtJUPHunpG
kNtJUPH

gfXPLNzsyfEotmHL, oJeXPLNzsyJuXP
XPLNzsy

NMBdDNTSoFTvyvCqjkXq, vEsBdDNTSoFTKrN

BdDNTSoFT