public class Person
{
    private int age;
    private String name;

    public Person()
    {
        age = -1;
        name = "none";
    }

    public Person(int anAge)
    {
        this();
        age = anAge;
    }

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

    public void show()
    {
        System.out.println(age + " " + name);
    }
}