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

SOLUTION: AznAuFjoBK

PROBLEM: UIjAMFDuxDDGkfQa, VdsHuxDDGkfZHZZ

SOLUTION: uxDDGkf

PROBLEM: hRVyvwHqnN, geHeyvwHqiBiYJ

SOLUTION:
yvwHq