A first wire in {HEAD ~ the two wire output port} is a data wire and a second wire in said {TAIL ~ the wire output port} is a clock wire 
A first wire in { HEAD ~ the two wire output port } is a data wire and a second wire in said { TAIL ~ the wire output port } is a clock wire
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH