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 Rust (1.15.1) (judge verdict: Accepted)

use std::io;
use std::str::FromStr;

fn input_tuple() -> (Vec<char>, Vec<char>) {
    let mut line: String = String::new();
    io::stdin().read_line(&mut line);
    let vec: Vec<String> = line.split_whitespace().map(|s| s.parse().unwrap()).collect();
    (vec[0].chars().collect(), vec[1].chars().collect())
}

fn main() {
    let (s, t) = input_tuple();
    for c in t {
        print!("{}", c);
    }
    for c in s {
        print!("{}", c);
    }
    println!();
}