import java.util.Scanner;

public class PointInFigure {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int h = Integer.parseInt(scanner.nextLine());
        int x = Integer.parseInt(scanner.nextLine());
        int y = Integer.parseInt(scanner.nextLine());

        if(isOutside(h, x, y)){
            System.out.println("outside");
        }
        else if(isInside(h, x, y)){
            System.out.println("inside");
        }
        else{
            System.out.println("border");
        }
    }

    private static boolean isInside(int h, int x, int y){
        return (((y < h) && (y > 0) && (x > 0) && (x < 3*h)) ||
                ((y >= h) && (y < 4*h) && (x > h) && (x < 2*h)));
    }

    private static boolean isOutside(int h, int x, int y){
        return (((x < 0) || (y < 0)) ||
                ((x > 3*h) || (y > 4*h)) ||
                ((y > h) && ((x < h) || (x > 2*h))));
    }
}