#include<bits/stdc++.h>
using namespace std;
int main(){
    setlocale(LC_CTYPE,"ja_JP.UTF-8");
    wstring s,ans;
    wcin>>s;
    for(int i=s.size()-1;i>=0;--i){
        ans.append(1,s[i]);
    }
    wcout<<ans<<endl;
}