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

SOLUTION: vzBhazk

PROBLEM: CdRbREFMEDTXnEzgn, zHLEMMEDTXnEPH

SOLUTION: MEDTXnE

PROBLEM: opvlxO, sgvlAP

SOLUTION:
vl