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;

class Program {
    static void Main(string[] args) {
        //入力
        string s = Console.ReadLine();
        //文字数
        int len = s.Length;

        //出力する文字列
        string ans;
        string ans_0;
        string ans_1;
        string ans_2;

        //判定
        if (len == 2) {
            ans = s;
        } else {
            ans_0 = s.Substring(2, 1);
            ans_1 = s.Substring(1, 1);
            ans_2 = s.Substring(0, 1);
            ans = ans_0 + ans_1 + ans_2;
        }

        //出力
        Console.WriteLine(ans);
    }
}