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

SOLUTION: YgVTSN

PROBLEM: uHGHiARtdJbuG, OdZmiARtdrhC

SOLUTION: iARtd

PROBLEM: sFIdqtIFRURFzezSrhjC, YkKxaFRURFzeasZ

SOLUTION:
FRURFze