a coin paying out {HEAD ~ means} for paying out coins from {TAIL ~ said change retaining means} according to paying out signals 
a coin paying out { HEAD ~ means } for paying out coins from { TAIL ~ said change retaining means } according to paying out signals
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH