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

SOLUTION: eaFmprNHq

PROBLEM: ATmVEtUuZOgsBUuL, UMUuZOgsBPVT

SOLUTION: UuZOgsB

PROBLEM: nrVNOqlzZHwY, alOqlzTXF

SOLUTION:
Oqlz