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

SOLUTION: TU

PROBLEM: JAfPtjqqUYMD, cpXItjqqFN

SOLUTION: tjqq

PROBLEM: lMZbTKOyueHGKjmwORr, XJfUKOyueHGfzYrq

SOLUTION:
KOyueHG