An apparatus for analyzing and comparing {HEAD ~ the copy quality} of the copies of an original to {TAIL ~ the original} 
to
An apparatus for analyzing and comparing { HEAD ~ the copy quality } of the copies of an original to { TAIL ~ the original }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL