In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

oUEcuLINTDdvdOne, thzWccuLINTDQfNZwH
cuLINTD

spUbdWDLWCeqr, vIuHkWDLWCQEPaz
WDLWC

POOhEslQkePt, FckFZEslQkKggjt

EslQk