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

SOLUTION: wpMQRxu

PROBLEM: aZcGMvzBhazkCIFqpVe, AOljBvzBhazkWXeTuA

SOLUTION: vzBhazk

PROBLEM: JqGiXJEmlrDafmgsDD, GjbljUudJEmlrDafRMd

SOLUTION:
JEmlrDaf