import java.util.Scanner;

public class GradeFun {

public static void main(String[] args) {

Scanner keyboard = new Scanner(System.in);

char grade;

System.out.println("Enter a grade");

grade = keyboard.next().charAt(0);

switch(grade) {

case 'A':

case 'a':

System.out.println("Great job!");

break;

case 'B':

case 'b':

System.out.println("Good job.");

break;

case 'C':

case 'c':

System.out.println("You can do better.");

break;

case 'D':

case 'd':

System.out.println("You're getting pretty close to failing");

break;

case 'F':

case 'f':

System.out.println("You are failing the course!");

break;

default:

System.out.println("You have entered an invalid grade.");

}//end switch

}//end main

}