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

sbQJFbUtmnKaEJePFPeRM, QzfvkdZbUtmnKaEJNrWD
bUtmnKaEJ

VXSNlHzkB, EoNlHCiL
NlH

OiADkozBnWt, kgCADkozHh

ADkoz