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

ATmVEtUuZOgsBUuL, UMUuZOgsBPVT
UuZOgsB

VutZiVkDQcVpQO, BDQVDyBdiVkDQcVpuvNN
iVkDQcVp

dCaRNLfalEDmKqCr, tFIpoQVFLfalEDmKqlGTIzyU

LfalEDmKq