class MyAbstract {
  public static void main( String[ ] args ) {
    // Create an object of the Student class, 
    // which inherits attributes and methods from Person.
    Student myStudent = new Student( args[0] );
    myStudent.graduationYear = Integer.parseInt( args[1] );
    System.out.print( myStudent.fname + " " );
    System.out.print( myStudent.graduationYear + " " );
    myStudent.study( );     // call abstract method
  }
}

// Abstract class
abstract class Person {
  public String fname;
  Person( String name ) { fname = name; }     // Constructor
  public abstract void study( );              // Abstract method
}

// Subclass (inheriting from Person)
class Student extends Person {
  public int graduationYear;
  // Constructor
  Student( String name ) { super( name ); }
  // The body of the abstract method is provided here.
  public void study( ) { System.out.print( "24/7" ); }
}