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

SOLUTION: JDbzqDx

PROBLEM: BmxgSFWBlVX, kGgKrgSFWBlGunFcZ

SOLUTION: gSFWBl

PROBLEM: oUXVXpVVZiIYa, CvVXpVVZALUoR

SOLUTION:
VXpVVZ