Based on {HEAD ~ the signal} from {TAIL ~ the difference integrating section}, the discriminating section discriminates the authenticity, denomination and top or bottom surface of the bill 
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Based on { HEAD ~ the signal } from { TAIL ~ the difference integrating section } , the discriminating section discriminates the authenticity , denomination and top or bottom surface of the bill
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH