refined ordering grammar

psGrammar/exercise/team_hypnodisc/takeOrder.jsgf

 #JSGF V1.0;
 grammar ToBI_takeOrder;
-public <order> = ([tobi] [i <wount> to order] [a] <drink> [tobi]) | ([tobi] bring me a <drink> [tobi]) | ([tobi] i want a <drink> [tobi]);
+public <order> = [tobi] <cmd> [tobi];
+<cmd> = ([i <wount> [to order]] | bring me a | i want a) <drink>;
 <wount> = ( would like | want );
 public <drink> = ( coke | beer | pringles );