Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

oder atc

Sample Output 1

atcoder

When S = oder and T = atc, concatenating T and S in this order results in atcoder.

Sample Input 2

humu humu

Sample Output 2

humuhumu

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

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

public class Main {

  public static void main(String[] args) {

    try {
      // 標準入力受け取り
      Scanner scan = new Scanner(System.in);      
      Long cookie_a     = Long.parseLong(scan.next()); //takahashi cookie
      Long cookie_b     = Long.parseLong(scan.next()); //aoki cookie
      Long play         = Long.parseLong(scan.next()); //kaisu
      
      //算出
      if (cookie_a >= play) {
        cookie_a -= play;
      } else {
        cookie_b = cookie_b - (play - cookie_a);
        cookie_a = 0L;
      }
      
      if (cookie_b < 0) cookie_b = 0L;
      
      System.out.print(cookie_a + " " + cookie_b);
      
    } catch (Exception e) {     
      System.out.print("error");
    }
  }
}