import java.io.*;

public class PB {	// Pipe by Byte copy

  public static void main(String[] arg) throws IOException, InterruptedException {
    File inputFile = new File(arg[0]);
    File outputFile = new File(arg[1]);

    FileInputStream in = new FileInputStream(inputFile);
    FileOutputStream out = new FileOutputStream(outputFile);
    int c;

    // Create a pipe for the threads to communicate with.

    PipedOutputStream pipeOut = new PipedOutputStream();
    PipedInputStream pipeIn = new PipedInputStream(pipeOut);

    // Start up the reader & writer threads.

    readThread rt = new readThread(in, pipeOut);
    writeThread wt = new writeThread(pipeIn, out);
    rt.start();
    wt.start();

    // Wait for both threads to complete.

    rt.join();
    wt.join();

    pipeIn.close();
    pipeOut.close();
    in.close();
    out.close();
  }
}

class readThread extends Thread {
  
  private FileInputStream input;
  private PipedOutputStream output;

  public readThread(FileInputStream in, PipedOutputStream out) {
    input = in;
    output = out;
  }

  public void run() {
    int c;
    try {
      while ((c = input.read()) != -1) output.write(c);
    }
    catch (Exception e) {};
  }
}

class writeThread extends Thread {
  
  private PipedInputStream input;
  private FileOutputStream output;

  public writeThread(PipedInputStream in, FileOutputStream out) {
    input = in;
    output = out;
  }

  public void run() {
    int c;
    try {
      while ((c = input.read()) != -1) output.write(c);
    }
    catch (Exception e) {};
  }
}