|-----------------------------------------------------|
|--------------------------------------------7__6__5__|
|-----------------------5__6__8__5__8__5__8__---------|
|0-2-3-2-0-2-3-2-0-2-3-2------------------------------|

|-----------------------------------------------------|
|-----------------------5__3__---------------7__6__5__|
|-----------------------------8__5__8__5__8__---------|
|0-2-3-2-0-2-3-2-0-2-3-2------------------------------|

|-----------------------5__---------------------------|
|--------------------------6__---------------7__6__5__|                      
|-----------------------------8__5__8__5__8__---------|                  
|0-2-3-2-0-2-3-2-0-2-3-2------------------------------|                  
                                                                         
|---------------------------------------------------|                    
|---------------------------------------------------|                    
|-----------------------6__5_-3___5___6__5___6___8__|                    
|0-2-3-2-0-2-3-2-0-2-3-2----------------------------| ---> X1            
_________________________________________________________________________
                                                                         |
|------------------------------|                                         |
|------------------------------|                                         |
|------------------------------|                                         |
|0-1-3-1-0-1-4-1-0-0-0-5---5--5|      ____     ______     ___    _____   |
                                     |_  _|   |_  _  \   |_ _\  |_  __|  |
|------------------------------|      /_ \      |  __/    || \\  | |__   |
|------------------------------|     /___ \     ||\\      || ||  |  __|  |
|------------------------------|   _//_  \ \_  _|| \\__  _||_// _| |__   |
|0-1-3-1-0-1-4-1-7-6-5-6---6--6|  |____||____||___||___||____/ |______|  |
                                                                         |
|------------------------------|                                         |
|------------------------------|                                         |
|------------------------------|                                         |
|0-1-3-1-0-1-4-1-0-0-0-5---5--5|                                         |
                                                                         |  
|------------------------------|                                         |   
|----------------------------76|                                         |  
|----------------------7-6-5---|                                         | 
|0-1-3-1-0-1-4-1-7-6-5---------|  ---->  X4                              |
_________________________________________________________________________|