{TAIL ~ The indicia} are made of a material responsive to UV emissions to render {HEAD ~ the indicia} visible 
{ TAIL ~ The indicia } are made of a material responsive to UV emissions to render { HEAD ~ the indicia } visible
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH