{HEAD ~ A bill} is supplied to {TAIL ~ the detecting section} which detects, for example, a magnetism pattern of the bill 
{ HEAD ~ A bill } is supplied to { TAIL ~ the detecting section } which detects , for example , a magnetism pattern of the bill
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH