{HEAD ~ The quantity} and nature of actual message transmissions involved in the primary communications test varies in {TAIL ~ accordance} with embodiments of the invention 
varies in
{ HEAD ~ The quantity } and nature of actual message transmissions involved in the primary communications test varies in { TAIL ~ accordance } with embodiments of the invention
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH