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

ljwjMioOwfOltGBaE, TneNGsoOwfOlxnWWW
oOwfOl

WjyKtxKtEYjP, vuBZJZyKtxKtXRZs
yKtxKt

yzUiRMMtXtYibMZ, WNcuEEiRMMtXtawZi

iRMMtXt