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

SOLUTION: Lw

PROBLEM: jinzsW, SMnzaW

SOLUTION: nz

PROBLEM: ykjUciBxgAiGM, LEEUciBxgMjYc

SOLUTION:
UciBxg