Problem:
Score : 100 points

Problem Statement

You are given a string S of length 2 or 3 consisting of lowercase English letters. If the length of the string is 2, print it as is; if the length is 3, print the string after reversing it.

Constraints

The length of S is 2 or 3.

S consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S

Output

If the length of S is 2, print S as is; if the length is 3, print S after reversing it.

Sample Input 1

abc

Sample Output 1

cba

As the length of S is 3, we print it after reversing it.

Sample Input 2

ac

Sample Output 2

ac

As the length of S is 2, we print it as is.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            // 文字の入力 
            string s = Console.ReadLine();
            if(s.Length == 2)
            {
                Console.WriteLine(s);
            }
            else if(s.Length == 3)
            {
                string s1 = s.Substring(2,1);
                string s2 = s.Substring(1,1);
                string s3 = s.Substring(0,1);
                Debug.WriteLine(s1 + s2 + s3);
                Console.WriteLine(s1+s2+s3);
            }


            /*
            int a = int.Parse(Console.ReadLine());
            // スペース区切りの整数の入力
            string[] input = Console.ReadLine().Split(' ');
            int b = int.Parse(input[0]);
            int c = int.Parse(input[1]);
            // 文字列の入力
            string s = Console.ReadLine();
            //出力
            Console.WriteLine((a + b + c) + " " + s);
            */
        }
    }
}