#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <string>

using namespace std;

int main (int argc, char * const argv[]) {
    // insert code here...
    string str;
	cin >> str;
	reverse(str.begin(), str.end());
	cout<<str<<endl;
	
	return 0;
}