#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <memory.h>
#include <map>
#include <set>
#include <queue>
#include <list>
#include <sstream>
#include <cstring>
#include <cassert>
using namespace std;

const int N = 256;

char s[N], tmp[N];
int main() {
    while (scanf("%[a-zA-Z]", s) != -1) {
        scanf("%[^a-zA-Z]", tmp);
        int len = strlen(s);
        reverse(s, s + len);
        printf("%s%s", s, tmp);
    }
    return 0;
}