H        ☐☐☐    ☐☐    
G        ☐☐☐☐☒☐☐☐☐    

F        ☒☒☒☐☐☐☐☐☐    
E        ☐☐☒☒☒☐☒☒☐    
D        ☒☒☒☒☒☒☒☒☒    
C        ☒☒☒☐☒☒☒☒☒    
B     ☐  ☐☒☒☒☒☒☒☐☒    
A    ☐☐☒☒☒☐☒☒☒☒☐☒☒☒☒