A desk includes a compartment for {HEAD ~ a silent printer} designed to prevent {TAIL ~ dirt} and dust from entering it 
designed to prevent
A desk includes a compartment for { HEAD ~ a silent printer } designed to prevent { TAIL ~ dirt } and dust from entering it
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH