#include <iostream>
#include <string>

using namespace std;
            
int main(){

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