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

SOLUTION: bi

PROBLEM: UmYbssMbmsXkKQuzNasLOib, EMqlbmsXkKQuzNcyHrpZXOQW

SOLUTION: bmsXkKQuzN

PROBLEM: dBVNkEjePRjAHVf, SUtNcEjePRjAxZNAmV

SOLUTION:
EjePRjA