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

SOLUTION: kZyKfPoOQE

PROBLEM: wbdHVigIkjNkuAmbr, iSgIkjNkQYyn

SOLUTION: gIkjNk

PROBLEM: oUEcuLINTDdvdOne, thzWccuLINTDQfNZwH

SOLUTION:
cuLINTD