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

SOLUTION: ZUNCUHtIi

PROBLEM: HHJAHyvNCGmJEljWrjvHOqf, msPVEbNCGmJEljsKRX

SOLUTION: NCGmJElj

PROBLEM: ATGSPQphynVaAkzpBaOs, LGrwpOGSPQphynVMZBTlT

SOLUTION:
GSPQphynV