00000000011111111112
   12345678901234567890
   ____________________
 1|     CCCCCCC                                                
 2| AAA CCCCCCC                                                
 3| AAA CCCCCCC                                                
 4| AAA CCCCCCC                                                
 5|    BCCCCCCC                                                
 6|    BBBBBB                                                  
 7|    BBBBBB                                                  
 8|    BBBBBB                                                  
 9|    BBBBBB                                                  
10|    BBBBBB                                                  
11|                                                            
12|DDDDDDDD                                                    
13|DDDDDDDD                                                    
14|DDDDDDDD                                                    
15|DDDDDDDD