BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        double minDooble = Double.parseDouble(new String(bufferedReader.readLine()));

        int intColor = 4;
        String [] color = new String[60];

        for (int i = 0; i <color.length ; i++) {
            if (i<(intColor-1)){
                color[i]="зеленый";
            } else if (i>=(intColor-1) && i<intColor){
                color[i]="желтый";
            } else if (i>=intColor){
                color[i]="красный";
                intColor = intColor + 5;
            }
        }

        System.out.println(color[(int) Math.floor(minDooble)]);