import java.util.Scanner; 
public class Lab04_Task03 {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        String fn = s.nextLine();
        String line = s.nextLine();
        String[] smarks = line.split("\\s+");
        double mark1 = Double.parseDouble(smarks[0]);
        double mark2 = Double.parseDouble(smarks[1]);
        double mark3 = Double.parseDouble(smarks[2]);
        double avg = (mark1+mark2+mark3)/3;
        String gl = "";
        String com = "";
        if (mark1<0 || mark2<0 ||mark3<0){
            gl = "X";
            com = "Invalid Marks!!, Negative marks not allowed.";
        } else {
            if ( mark1 > 100 || mark2 > 100 || mark3 > 100 ) {
                gl = "X";
                com = "Invalid Marks!!, Marks too high.";
            } else {
            if (avg >= 80) {
                gl = "1";
                com = "Magnificent!!";
            } else if (avg >= 70) {
                gl = "2";
                com = "Excellent!!";
            } else if (avg >= 60) {
                gl = "3";
                com = "Good work!!";
            } else if (avg >= 50) {
                gl = "4";
                com = "Good!!";
            } else {
                gl = "0";
                com = "Fail - Try again next Year!!";
            }}
        }
        System.out.println("Student name: "+fn);
        System.out.println("Grade Level: "+gl);
        System.out.println("Comment: "+com);
    }
}