#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<char> ch;
    char s;
    while(cin>>s)
        ch.push_back(s);
    ostream_iterator<char> os(cout);  //输入流迭代器
    copy(ch.rbegin(), ch.rend(), os);  
    
    return 0;
}