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