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

SOLUTION: XUzpStD

PROBLEM: biAihydBoNlzR, IAloNhydBolwUz

SOLUTION: hydBo

PROBLEM: NwmTIZSnlKGG, qAYIZSnfWRd

SOLUTION:
IZSn