import java.io.*;
public class Pakkija
{

public static void main(String argumendid[]) throws IOException{
	int i=0;
	String tyhik= new String(" ");
	String rida=new String();
	String tmp= new String();
	String tmp2= new String();
	PrintWriter valja=new PrintWriter(new FileWriter("!p.txt"));
	BufferedReader sisse=new BufferedReader(new FileReader("art.txt"));

	do
	{
		rida=sisse.readLine();
		if (rida!=null)
		{
//		System.out.println(rida);
		rida.trim();
		tmp=rida;
		while(tmp.indexOf(" ")>-1)
		{
	     		String a=tmp.substring(0, tmp.indexOf(" "));
			tmp2=tmp2+a;
			String b=tmp.substring(tmp.indexOf(" ")+1);
			tmp=b;
			

		}

		}
		else
		{
		valja.println(tmp2);
		}
	} while(rida!=null);

	
	sisse.close();
	valja.close();
	}
}