#include <iostream>
#include <queue>
#include <vector>
#include <math.h>
#include <algorithm>
#include <iomanip>
#include <string>
using namespace std;

int main(){
	string str;
	cin >> str;
	for (int i = str.length() - 1; i >= 0; --i) {
		cout << str[i];
	}
	cout << endl;
	return 0;
}