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

SOLUTION: vzBhazk

PROBLEM: GoodBOwvrki, kRCsdBOwvrakgiH

SOLUTION: dBOwvr

PROBLEM: dgRzjBXeZOTq, lURzjBXHP

SOLUTION:
RzjBX