Furthermore, {TAIL ~ the passageways} can have {HEAD ~ any size} or shape desired, including circular or non circular shapes 
Furthermore , { TAIL ~ the passageways } can have { HEAD ~ any size } or shape desired , including circular or non circular shapes
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH