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