5 	 7 
 
 4 5 	 0 	 0 	 0 	 0 	 0 	 0 
 
 4 6 	 0 	 0 	 0 	 0 	 0 	 0 
 
 4 7 	 0 	 0 	 0 	 0 	 0 	 0 
 
 4 8 	 0 	 0 	 0 	 0 	 0 	 0 
 
 4 9 	 0 	 0 	 0 	 0 	 0 	 0 
 
 