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 Common Lisp (SBCL 1.1.14) (judge verdict: Accepted)

(let ((lst (concatenate 'list (read-line))))
  (if (= 2 (length lst))
      (format t "~A" (concatenate 'string lst))
      (format t "~A" (concatenate 'string (reverse lst)))))