public class reserveNumber {
  public static void main(String[] args) {
     Scanner scanner = new Scanner(System.in);

     while(scanner.hasNext()){
         int n = scanner.nextInt();
         String str = String.valueOf(n);
         char[] charArry = str.toCharArray();
         StringBuffer sb = new StringBuffer();
         int length = str.length();
        for(int i =length-1;i>=0;i--){
             sb.append(charArry[i]);
         }
        System.out.println(String.valueOf(sb));
     }
  }
}