The blades then stop and {HEAD ~ the motion} is reversed with the herring slices between {TAIL ~ the blades} 
The blades then stop and { HEAD ~ the motion } is reversed with the herring slices between { TAIL ~ the blades }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL