paste bin

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

public class Main {
    public static void main(String[] args) {
        BufferedReader bf;
        bf = new BufferedReader(new InputStreamReader(System.in));
        try {
            String[] msg = bf.readLine().split(" ");
            System.out.println(msg[1]+msg[0]);            
        } catch (IOException e) {
            System.exit(0);
        }
    }
}