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