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

SOLUTION: GjsaKsU

PROBLEM: kvutZfcPKzHE, kTKutZfcPTGmU

SOLUTION: utZfcP

PROBLEM: GxovzzzlFVDZOvJtYWBMLtdPvokF, ZGynuKMnXjFVDZOvJtYWeMQ

SOLUTION:
FVDZOvJtYW