import java.util.*;
import java.io.*;
public class Exams {
  
  
  public static void main(String[] args) throws Exception{ 
    
    Scanner inFile = new Scanner(new File("input.txt"));
    
    int numStudents=0;
    int exam1Total=0, exam2Total=0, exam3Total=0;
    
    while(inFile.hasNext()) {
      numStudents++;
      String first = inFile.next();
      String last = inFile.next();
      int exam1 = inFile.nextInt();
      int exam2 = inFile.nextInt();
      int exam3 = inFile.nextInt();
      
      double average = calculateStudentAverage(exam1, exam2, exam3);
      char letter = calculateLetter(average);
      
      printStudentInformation(first, last, exam1, exam2, exam3, average, letter);
      
      exam1Total=updateTotal(exam1Total, exam1);
      exam2Total=updateTotal(exam2Total, exam2);
      exam3Total=updateTotal(exam3Total, exam3);
    }
    
    double exam1Average = calculateClassAverage(exam1Total, numStudents);
    double exam2Average = calculateClassAverage(exam2Total, numStudents);
    double exam3Average = calculateClassAverage(exam3Total, numStudents);
    
    printClassData(exam1Average, exam2Average, exam3Average);
  }
  
  public static double calculateStudentAverage(int exam1Score, int exam2Score, 
                                          int exam3Score) {//parameters 
  
     double average = (exam1Score+exam2Score+exam3Score)/3.0;
     
     return average;
  
  }
  
  public static char calculateLetter(double average) {
    
    return average>60? 'P': 'F';
    
  }
  
  public static void printStudentInformation(String first, String last,
                                          int exam1, int exam2, int exam3,
                                          double average, char letter) {
      
      System.out.println(first+" "+last+" got scores of: ");
      System.out.println(exam1+", "+exam2+", "+exam3+".");
      System.out.println(first+" "+last+" got a grade of "+average+" "+letter);
  }
  
  public static int updateTotal(int oldTotal, int newValue) {
    return oldTotal + newValue;
  }
  
  public static double calculateClassAverage(int examTotal, int numStudents) {
    return (double)examTotal / numStudents;
  }
  
  public static void printClassData(double avg1, double avg2, double avg3){
    
    printExamData(avg1, 1);
    printExamData(avg2, 2);
    printExamData(avg3, 3);
  }
  
  public static void printExamData(double average, int examNo) {
    
    System.out.println("The class got an average of "+average+" on exam #"+examNo);
    
  }
  
}