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

SOLUTION: loYaejTc

PROBLEM: Owbiay, exbime

SOLUTION: bi

PROBLEM: iZRrzTLDTUGXf, MomzTLDTUHyvId

SOLUTION:
zTLDTU