Main.java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws Exception {
        java.util.Scanner sc = new java.util.Scanner(System.in);
        String a;
        String b;
        a=sc.nextLine();
        b=sc.nextLine(); 
        System.out.println(a+b);
    }
}