import java.io.*;class FileDescriptorDemo {    public static void main(String[] args) {        FileOutputStream stderr =             new FileOutputStream(FileDescriptor.err);        FileOutputStream stdout =             new FileOutputStream(FileDescriptor.out);        FileInputStream stdin =            new FileInputStream(FileDescriptor.in);        try {            StringBuffer sb = new StringBuffer();            int c;            while ((c=stdin.read()) > -1) {                if (c == '\n' || c == '\r')                    break;                sb.append((char)c);            }            // print to standard out            byte[] buf = new byte[sb.length()];            sb.toString().getBytes(0, buf.length, buf, 0);            stdout.write(buf);            stdout.write('\n');            stdout.flush();        } catch (IOException e) {            e.printStackTrace();        }    }}