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

SOLUTION: DnZqSu

PROBLEM: slTUxy, oqTUYa

SOLUTION: TU

PROBLEM: lbuBDK, pIuBqP

SOLUTION:
uB

