{TAIL ~ A single pass printer} prints in a first direction and a second direction on {HEAD ~ a print medium} 
{ TAIL ~ A single pass printer } prints in a first direction and a second direction on { HEAD ~ a print medium }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD