#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>
#include <sstream>
#include <cstdlib>
#include <cmath>
 
using namespace std;

int main(){
    string str = "";
    cin >> str;
    reverse(str.begin(), str.end());
    cout << str << endl;
    return 0;
}