{HEAD ~ a waste ink outlet} in {TAIL ~ fluid communication} with the printhead IC via a downstream ink line 
in
{ HEAD ~ a waste ink outlet } in { TAIL ~ fluid communication } with the printhead IC via a downstream ink line
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH