{TAIL ~ The end conductive segments} at each polygon vertex in {HEAD ~ the outermost row} are disjoined in the outermost row 
{ TAIL ~ The end conductive segments } at each polygon vertex in { HEAD ~ the outermost row } are disjoined in the outermost row
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH