By using {HEAD ~ knowledge} of {TAIL ~ the ranges} of serial numbers , ticket sales can be tracked 
of
By using { HEAD ~ knowledge } of { TAIL ~ the ranges } of serial numbers , ticket sales can be tracked
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH