Grade

import java.util.Scanner;

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

        double a = Double.parseDouble(scanner.nextLine());

        if (a >= 5.5 && a <= 6.0) {
            System.out.println("Excellent!");
        } else if (a > 6 || a<2) {
            System.out.println("Not a grade");
        }else{
            System.out.println("Not excellent.");
        }
    }
}