In the illustrated embodiment, {TAIL ~ the forward signal arrangement} 204 is realized using {HEAD ~ a second order topology} 
In the illustrated embodiment , { TAIL ~ the forward signal arrangement } 204 is realized using { HEAD ~ a second order topology }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD