import java.io.*;
import java.util.*;

public class SequencePrinter {

  public static void main(String[] args) throws IOException {

    Vector theStreams = new Vector();

    for (int i = 0; i < args.length; i++) {
       FileInputStream fin = new FileInputStream(args[i]);
       theStreams.addElement(fin);
    }

    InputStream in = new SequenceInputStream(theStreams.elements());
    for (int i = in.read(); i != -1; i = in.read()) {
      System.out.write(i);
    }
  } 
}