//C语言版代码
#include <stdio.h>
int main() {
    char s[100], t[100];
    scanf("%s%s", s, t);
    printf("%s%s\n", s, t);
    return 0;
}
//C++版代码
#include <iostream>
using namespace std;
int main() {
    string s, t;
    cin >> s >> t;
    cout << s << t;
    return 0;
}
//Java版代码
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = sc.next();
        System.out.println(s + t);
    }
}