public class HelloWorld {

    public static void main(String[] args) {
        Person michal = new Person("Michal");
        Student patryk = new Student("Patryk", 23);
        Employee emp = new Employee("Patryk", 24, "gurnik");

        Person[] tab = new Person[3];
        tab[0] = michal;
        tab[1] = patryk;
        tab[2] = emp;

        PrintPersons(tab);
    }

    public static void PrintPersons(Person[] persons){
        for(int i = 0; i < persons.length; i++){
            System.out.println(persons[i]);
        }
    }
}

class Person {
    private String name;

    public Person(String name){
        this.name = name;
    }

    @Override
    public String toString(){
        return this.name;
    }
}

class Student extends Person {
    private int age;

    public Student(String name, int age) {
        super(name);
        this.age = age;
    }

    @Override
    public String toString(){
        return "Student: " + super.toString() + " " + age;
    }
}

class Employee extends Student {
    private String job;

    public Employee(String name, int age, String job){
        super(name, age);
        this.job = job;
    }

    @Override
    public String toString(){
        return "Pracownik, " + super.toString() + " " + job;
    }
}