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