TASK DEFINITION: In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
PROBLEM: HorIyjpfBFmKZQUIEoP, AcWOaOgVPmyjpfBFmKZQPFYiI

SOLUTION: yjpfBFmKZQ

PROBLEM: KKrCLvJKRoyV, WDeLvJKCBdS

SOLUTION: LvJK

PROBLEM: cONoBIVzeZIayrAxqwZmeChoitnPfy, mkewIayrAxqwZmVrqxNpa

SOLUTION:
IayrAxqwZm