import java.util.Scanner;

public class ConcatenateStrings {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        
        System.out.println(concatStrings(a, b));
    }
    
    public static String concatStrings(String a, String b) {
        return a + b;
    }
}