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

SOLUTION: HPpvVtFQN

PROBLEM: eNuawupVqQ, RIawuplUIf

SOLUTION: awup

PROBLEM: foIilyADrOjIQw, XjqmyADrOjwPg

SOLUTION:
yADrOj