{HEAD ~ The respective outputs} of {TAIL ~ the filters} are coupled through a multiplexer to a squarer 
{ HEAD ~ The respective outputs } of { TAIL ~ the filters } are coupled through a multiplexer to a squarer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH