{HEAD ~ A printer} includes a paper feeder, {TAIL ~ toner}, a photo conductor, and various mechanisms 
{ HEAD ~ A printer } includes a paper feeder , { TAIL ~ toner } , a photo conductor , and various mechanisms
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH