C/#B/bbD 	#C/xB/bD	
D/xC/bbE	#D/bE/bbF	
E/xD/bF		
F/#E/bbG	#F/xE/bG	
G/xF/bbA	#G/bA	
A/xG/bbB	#A/bB/bbC	
B/xA/bC