GCDN

____________________$____________________
___________________$$$___________________
___________________$$$___________________
__________________$$$$$__________________
__________________$$$$$__________________
__________________$$$$$__________________
__$$______________$$$$$____________$$____
___$$$____________$$$$$___________$$$____
____$$$$$_________$$$$$________$$$$$_____
_____$$$$$$$______$$$$$_____$$$$$$$______
_______$$$$$$$____$$$$$___$$$$$$$________
__________$$$$$____$$$___$$$$$___________
_$$$$$$$______$$$__$$$__$$$______$$$$$$$_
_____$$$$$$$$____$$_$_$$____$$$$$$$$_____
_________$$$$$$$$$_$$$_$$$$$$$$$_________
________________$$$_$_$$$________________
____________$$$$$___$___$$$$$____________
___________$________$________$___________
____________________$____________________