{TAIL ~ A second receiving unit} of the plurality of receiving units forms a selection for {HEAD ~ the content} and communicating the selection to the first receiving unit 
{ TAIL ~ A second receiving unit } of the plurality of receiving units forms a selection for { HEAD ~ the content } and communicating the selection to the first receiving unit
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH