Furthermore, {TAIL ~ the number} of conductive segments in {HEAD ~ a given edge} of a given row may be odd or even 
Furthermore , { TAIL ~ the number } of conductive segments in { HEAD ~ a given edge } of a given row may be odd or even
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH