import java.util.Scanner;

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

        System.out.println("Enter the percentage obtained by the student:");
        double percentage = sc.nextDouble();

        char grade;

        if (percentage >= 90) {
            grade = 'A';
        } else if (percentage >= 80) {
            grade = 'B';
        } else if (percentage >= 70) {
            grade = 'C';
        } else if (percentage >= 60) {
            grade = 'D';
        } else if (percentage >= 50) {
            grade = 'E';
        } else {
            grade = 'F';
        }

        switch (grade) {
            case 'A':
                System.out.println("Grade: A - Excellent");
                break;
            case 'B':
                System.out.println("Grade: B - Very Good");
                break;
            case 'C':
                System.out.println("Grade: C - Good");
                break;
            case 'D':
                System.out.println("Grade: D - Satisfactory");
                break;
            case 'E':
                System.out.println("Grade: E - Sufficient");
                break;
            case 'F':
                System.out.println("Grade: F - Fail");
                break;
            default:
                System.out.println("Error: Invalid grade");
        }

        sc.close();
    }
}