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

SOLUTION: JPsWWszK

PROBLEM: vytthSjj, XVttthSFAvk

SOLUTION: tthS

PROBLEM: UZbmGVDzIaf, qfHwqGVDzIsd

SOLUTION:
GVDzI