Description: You are given a string S of even length s1..s2n . Perform the following manipulations: - divide it into two halves s1..sn and sn + 1..s2n - reverse each of them sn..s1 and s2n..sn + 1 - concatenate the resulting strings into sn..s1s2n..sn + 1 Output the result of these manipulations. Input Format: The only line of the input contains a string of lowercase Latin letters. The length of the string is between 2 and 20, inclusive, and it is even. Output Format: Output the string which is the result of the described manipulations. Note: None