{TAIL ~ Each} of {HEAD ~ the color filters} is used to realize red, green, and blue colors 
{ TAIL ~ Each } of { HEAD ~ the color filters } is used to realize red , green , and blue colors
TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH