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