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

SOLUTION: zHe

PROBLEM: lQwpMQRxuVbJDv, UkzwpMQRxuDVT

SOLUTION: wpMQRxu

PROBLEM: LZTSmBhPe, NLSmBUy

SOLUTION:
SmB