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

int main()
{
    int n;
    cin >> n;
    string s = "";
    while(n > 0) {
        s += (n % 10) + '0';
        n /= 10;
    }
    reverse(s.begin(), s.end());
    cout << s << endl;
    return 0;
}