The system 1, wherein the simulator is configured to receive {HEAD ~ input} from {TAIL ~ a user} and to transmit the user input to the simulation computer 
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The system 1 , wherein the simulator is configured to receive { HEAD ~ input } from { TAIL ~ a user } and to transmit the user input to the simulation computer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH