$$$$$$$$_________________________________$$$$$$$$
$$$___________________________________________$$$
$$$_$$$$$$$________$$$$$$$____________________$$$
$$$_$$_____________$$___$$____________________$$$
$$$_$$$$$$$_$$$$$$_$$$$$$$_$$___$$$$$$_$$__$$_$$$
$$$______$$_$$__$$_$$______$$___$$__$$__$$$$__$$$
$$$______$$_$$__$$_$$______$$___$$$$$$___$$___$$$
$$$_$$$$$$$_$$$$$$_$$______$$$$_$$__$$__$$____$$$
$$$___________________________________________$$$
$$$$$$$$_________________________________$$$$$$$$