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

SOLUTION: vVyJcSdY

PROBLEM: kUoqCMPFTqGE, guoqCMPkwJs

SOLUTION: oqCMP

PROBLEM: TENCVWzPtrJyjM, AvCdzPtrJycd

SOLUTION:
zPtrJy