What will be the output of the program? class Super { public Integer getLength() { return new Integer(4); } }

public class Sub extends Super { public Long getLength() { return new Long(5); }

public static void main(String[] args) { Super sooper = new Super(); Sub sub = new Sub(); System.out.println( sooper.getLength().toString() + "," + sub.getLength().toString() ); } }