{TAIL ~ A hollow closed end needle} 10 has been inserted in {HEAD ~ flexible closed end sheath} 4 
{ TAIL ~ A hollow closed end needle } 10 has been inserted in { HEAD ~ flexible closed end sheath } 4
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH