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

SOLUTION: ILNeNQbJy

PROBLEM: jkGcUm, dxGcSI

SOLUTION: Gc

PROBLEM: UbndxizDNItto, izkndxizDXzppis

SOLUTION:
ndxizD