You are given a string S of even length s₁..s_2n . Perform the following manipulations:

• divide it into two halves s₁..s_n and s_n + 1..s_2n
• reverse each of them s_n..s₁ and s_2n..s_n + 1
• concatenate the resulting strings into s_n..s₁s_2n..s_n + 1

Output the result of these manipulations.

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 the string which is the result of the described manipulations.