Problem Description

You are given a string $ S $ of length $ 2 $ or $ 3 $ consisting of lowercase English letters. If the length is $ 2 $, output it as is. If the length is $ 3 $, output it in reverse order.

Input Format

The input is given from the standard input in the following format:

$ S $

Output Format

If the length of $ S $ is $ 2 $, output it as is. If the length is $ 3 $, output it in reverse order.

Sample Input and Output

Sample Input #1

abc

Sample Output #1

cba

Sample Input #2

ac

Sample Output #2

ac

Notes/Hints

Constraints

• The length of $ S $ is either $ 2 $ or $ 3 $.
• $ S $ consists of lowercase English letters.

Sample Explanation 1

The length of $ S $ is $ 3 $, so output it in reverse order.

Sample Explanation 2

The length of $ S $ is $ 2 $, so output it as is.

见题面 Input 部分

见题面 Output 部分