A gaming machine 50 has {TAIL ~ a display} 51 on which an array of {HEAD ~ symbols} is displayed 
A gaming machine 50 has { TAIL ~ a display } 51 on which an array of { HEAD ~ symbols } is displayed
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH