import java.util.Scanner;

public class Main{
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    String name = in.next();
    int size = name.length();
    String word = "";
    for (int i = 0; i < name.length(); i++) {
      char rev = name.charAt(size-i-1); // Index is Zero..... size = 4, i=0, -1 == 3;
      word = word + rev;
    }
    System.out.println(word);
  } 
}