#include <iostream>
#include <vector>
using namespace std;

int main() {
    string input;

    cin >> input;

    vector<char> digits;
    for (char c : input) {
        digits.push_back(c);
    }

    for (auto it = digits.rbegin(); it != digits.rend(); ++it) {
        cout << *it;
    }


    return 0;
}