import java.util.List;
 
/**
 * Created by aaron on 11/8/2017.
 */
abstract class Selecter<ACTION> {
    abstract class State {
        public abstract List<ACTION> getActions();
        public abstract ACTION selectAction(List<ACTION> list, int selector);
    }
 
    public ACTION searchAction(State state, int selector) {
        return state.selectAction(state.getActions(), selector);
    }
 
    public static void main(String[] args) {}
}

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