{TAIL ~ The game machines} may include a base game, rewards tracking module, and {HEAD ~ a game management module} 
{ TAIL ~ The game machines } may include a base game , rewards tracking module , and { HEAD ~ a game management module }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD