{HEAD ~ The input mechanism} with {TAIL ~ the non physical contact data interface} may be one of a bill validator, a bar code reader and a Radio Frequency Identification tag reader 
with
{ HEAD ~ The input mechanism } with { TAIL ~ the non physical contact data interface } may be one of a bill validator , a bar code reader and a Radio Frequency Identification tag reader
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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 OTH OTH