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