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

SOLUTION: equ

PROBLEM: hUpEbyvEcQ, dHpEbyvEvwsXcN

SOLUTION: pEbyvE

PROBLEM: lvtBWQWRsXjPgDiJhLk, vCSQWRsXjPjK

SOLUTION:
QWRsXjP