/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    private String abc;
 
    public String toString() {
        return abc;
    }
 
    public static void main(String[] args) {
        Ideone so = new StackOverflowExtended();
        System.out.println(System.getProperty("java.version"));
        System.out.println(so);
    }
    public static class StackOverflowExtended extends Ideone {
        public StackOverflowExtended() {
            super.abc = "extended";
        }
    }
}

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