We further describe a printing system capable of laying down {HEAD ~ said materials} in {TAIL ~ a definite pattern} 
We further describe a printing system capable of laying down { HEAD ~ said materials } in { TAIL ~ a definite pattern }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL