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