import java.io.*; 
  
public class GradeB 
{ 
  public static void main(String[] argv) throws Exception 
  { 
    BufferedReader cin; 
    cin = new BufferedReader(new InputStreamReader(System.in)); 
  
    // read a score from the keyboard (see 5.1) 
    int score; 
    System.out.print("What is your test score? [0-100]: "); 
    score = new Double(cin.readLine()).intValue(); 
  
    // see if score is in the B range 
    if (score >= 80 && score < 90) 
      System.out.println("Your grade is B"); 
  } 
}