import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.SequenceInputStream;
import java.util.Vector;
public class Main {
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);
}
}
}