public class Person {

    private int studentno;
    private int teacherno;
    private String studentname;
    private String teachername;
    private int mark;

    public Person(int studentno, String studentname, int mark) {
        this.studentno = studentno;
        this.studentname = studentname;
        this.mark = mark;
        System.out.println(studentno + studentname + mark);
    }

    public Person(int teacherno, String teachername) {
        this.teacherno = teacherno;
        this.teachername = teachername;
        System.out.println(teacherno + teachername);
    }

    public static void main(String[] args) {
        //int x,z;
        //char y[]=new char[20];
        //System.out.println("input");
        Person r = new Person(1, "", 1);
        Person r1 = new Person(2, "");
    }

}