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

TUAHhdvHIBxogI, LjfGsAHhdvHJcSdNV
AHhdvH

DFRoMPNDAzNgtLsEPseOzC, qykyPjDAzNgtLsEPYTsNrJaNK
DAzNgtLsEP

vePAZqdZhZTA, vdpZiPAZqdIMreG

PAZqd