The control unit controls {TAIL ~ print} of a background design image by the first development unit and print of a print image by {HEAD ~ the second development unit} 
The control unit controls { TAIL ~ print } of a background design image by the first development unit and print of a print image by { HEAD ~ the second development unit }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD