public class Practice {

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

System.out.print("학점을 입력하세요 >>");

String grade = scanner.next();

switch(grade){

case "A": case "B":

System.out.println("Excellent");

break;

case "C" : case "D":

System.out.println("Good");

break;

case "F":

System.out.println("Bye");

break;

}

scanner.close();

}

}