the quantity of {HEAD ~ knives} included in {TAIL ~ the first and second sets} being dissimilar relative to each other 
included in
the quantity of { HEAD ~ knives } included in { TAIL ~ the first and second sets } being dissimilar relative to each other
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH