________$$$$
_______$$__$
_______$___$$
_______$___$$
_______$$___$$
... ________$____$$ ________$$____$$$
_________$$_____$$
_________$$______$$
__________$_______$$
____$$$$$$$________$$
__$$$_______________$$$$$$ _$$____$$$$____________$$$
_$___$$$__$$$____________$$
_$$________$$$____________$
__$$____$$$$$$____________$
__$$$$$$$____$$___________$
__$$_______$$$$___________$ ___$$$$$$$$$__$$_________$$
____$________$$$$_____$$$$
____$$____$$$$$$____$$$$$$
_____$$$$$$____$$__$$
_______$_____$$$_$$$
________$$$$$$$$$$