#include <iostream>
#include <string>

using namespace std;

int main(int argc, char *argv[]) {
  string str;

  cin >> str;
  string::reverse_iterator itr = str.rbegin();
  while (itr != str.rend()) {
    cout << *itr;
    itr++;
  }
  cout << endl;
  return 0;
}