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 PHP (5.6.30) (judge verdict: Accepted)

<?php
    $S = trim(fgets(STDIN));
    
    if (strlen($S) == 2) {
        echo $S;
    } else {
        for ($i = 2; $i >= 0; $i--) {
            echo $S[$i];
        }
    }
?>