{TAIL ~ The filament cathodes} mounted in {HEAD ~ a fluorescent display tube} can reduce the power consumption of the fluorescent display tube 
{ TAIL ~ The filament cathodes } mounted in { HEAD ~ a fluorescent display tube } can reduce the power consumption of the fluorescent display tube
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH