import java.util.*;
public class LetterGrade {
  
  
  public static void main(String[] args) { 
    
    Scanner input = new Scanner(System.in);
    
    System.out.print("Enter your grade: ");
    int grade = input.nextInt();
    
    char letter;
    if(grade < 60)
      letter = 'F';
    else if(grade>=60 && grade<70)
      letter = 'D';
    else if(grade>=70 && grade<80)
      letter = 'C';
    else if(grade>=80 && grade<90)
      letter = 'B';
    else
      letter = 'A';
    
    System.out.println(grade+ " gets you a grade of " + letter);
    /*
     * if(grade>=90)
     *   letter = 'A';
     * else if(grade>=80)
     *   letter = 'B';
     * else if(grade>=70) ...
     */
    
    letter = grade>=90? 'A' : 
             grade>=80? 'B' :
             grade>=70? 'C' :
             grade>=60? 'D' : 'F';
  
  
  
  
  
  
  
  }
  
  
  

  
}