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

bjjsMtBzzXIgYWPBZmaDL, iTxktmvBzzXIgYWPhbAyBE
BzzXIgYWP

wNiHcaiUPHnjp, aSTmjcaiUPHFzOu
caiUPH

cSmOdpHPqX, NgmOdpVT

mOdp