import java.io.*;

import java.lang.reflect.Field;
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    Field fd = FileDescriptor.class.getDeclaredField("fd");
	    fd.setAccessible(true);
	    System.out.println("stdin: "+fd.get(FileDescriptor.in));
	    System.out.println("stdout: "+fd.get(FileDescriptor.out));
	    System.out.println("stderr: "+fd.get(FileDescriptor.err));
	}
}