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

SOLUTION: LZd

PROBLEM: rvLoiycpZw, idcvoiycpcLyD

SOLUTION: oiycp

PROBLEM: jhqgvGBMauGdA, YcVtXvGBMauGgpDLSoH

SOLUTION:
vGBMauG