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

OVZxWYzAAxG, rStOxWYzJeoC
xWYz

GrvtMjEvRlmN, ifGOWMjEvRPSOZK
MjEvR

xGsdtAJRzuHnV, erSmAJRzuJJjrl

AJRzu