Given are two strings S and T consisting of lowercase English letters. Concatenate T and S in this order, without space in between, and print the resulting string.

Constraints

* S and T are strings consisting of lowercase English letters.
* The lengths of S and T are between 1 and 100 (inclusive).

Input

Input is given from Standard Input in the following format:


S T


Output

Print the resulting string.

Examples

Input

oder atc


Output

atcoder


Input

humu humu


Output

humuhumu
import  java.util.*;
class Main {
  public static void main(String[] args){
    Scanner c=new Scanner(System.in);
    String s=c.next();
    String t=c.next();
    System.out.println(t+s);
  }
}