import java.util.Scanner;

class Person { String firstName; String lastName; int id;

public Person(String firstName, String lastName, int id) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.id = id;
}

}

class Student extends Person { private int[] testScores;

public Student(String firstName, String lastName, int id, int[] testScores) {
    super(firstName, lastName, id);
    this.testScores = testScores;
}

public char calculate() {
    int sum = 0;
    for (int score : testScores) {
        sum += score;
    }
    int avg = sum / testScores.length;

    if (avg >= 90) return 'O';
    else if (avg >= 80) return 'E';
    else if (avg >= 70) return 'A';
    else if (avg >= 55) return 'P';
    else if (avg >= 40) return 'D';
    else return 'T';
}

}

public class Solution { public static void main(String[] args) { Scanner scn = new Scanner(System.in); String firstName = scn.next(); String lastName = scn.next(); int id = scn.nextInt(); int numScores = scn.nextInt(); int[] scores = new int[numScores];

    for (int i = 0; i < numScores; i++) {
        scores[i] = scn.nextInt();
    }

    Student std = new Student(firstName, lastName, id, scores);
    System.out.println("Name: "+lastName+", "+firstName);
    System.out.println("ID: "+id);
    System.out.println("Grade: "+std.calculate());
    scn.close();
}

}