import java.util.Scanner;

public class Ifelse1
{
  public static void main(String[] args)
  {
    Scanner input = new Scanner(System.in);

    int score;
    char grade;
    System.out.print("\nPlease enter test grade: ");
    score = input.nextInt();
   
    if (score >= 90)
       grade = 'A';
    else if (score >= 80)
       grade = 'B';
    else if (score >= 70)
       grade = 'C';
    else if (score >= 60)
       grade = 'D';
    else
       grade = 'F';

    System.out.println("\nStudent grade = " + grade);
  }
}