import java.util.Comparator;
import java.util.*;
import java.io.*;

class Student {
  String firstName;
  String lastName;
  int AEM;

  public Student(int AEM, String firstName, String lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.AEM = AEM;
  }
    
  public String toString() {
    return String.format("%5d. %s, %s", AEM, lastName, firstName);
  }
  
  // First anonymous comparator class
  static Comparator<Student> lexicographicCmp = new Comparator<Student>() {
    public int compare(Student st1, Student st2) {
      int cmp = st1.lastName.compareTo(st2.lastName);
      if(cmp==0)
        cmp = st1.firstName.compareTo(st2.firstName);
      if(cmp==0)
        cmp = st1.AEM - st2.AEM;
      return cmp;
    }
  };

  public static void sortLexicographically(List<Student> students) {    
    Collections.sort(students, Student.lexicographicCmp);
  }
  
  public static void sortByAEM(List<Student> students) {
    // Second anonymous comparator class
    Collections.sort(students, new Comparator<Student>() {
        public int compare(Student st1, Student st2) {
          int cmp = st1.AEM - st2.AEM;
          if(cmp==0)
            cmp = st1.lastName.compareTo(st2.lastName);            
          if(cmp==0)
            cmp = st1.firstName.compareTo(st2.firstName);
          return cmp;
        }
      }
    );
  }
}