#include <iostream>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <string>
#define rep(x,to) for(x=0;x<to;x++)
#define rep2(x,from,to) for(x=from;x<to;x++)

using namespace std;


int main(void){

string st;
	cin >> st;
	reverse(st.begin(),st.end());
	cout << st << endl;
	return 0;
}