The method 12 comprising configuring the data structure to include {HEAD ~ data} representing {TAIL ~ a symbol kind} which, if included in a winning outcome set S is not removed from the display 
representing
The method 12 comprising configuring the data structure to include { HEAD ~ data } representing { TAIL ~ a symbol kind } which , if included in a winning outcome set S is not removed from the display
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH