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

SOLUTION: SNN

PROBLEM: CiTNsbepy, DFNsbeZl

SOLUTION: Nsbe

PROBLEM: lLXyIHBzV, lxjXyIHehm

SOLUTION:
XyIH

