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

SOLUTION: cYRVFFq

PROBLEM: KJswoapnXz, EQswoaFyH

SOLUTION: swoa

PROBLEM: nPrhEeFTqOZdS, GlvEeFTqOZnsZvLP

SOLUTION:
EeFTqOZ