The following languages are only available languages for the problems from the contest

VK Cup 2015 - Wild Card Round 1:

- Picat 0.9

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B. String inside out

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputYou are given a string *S* of even length *s*_{1}..*s*_{2n} . Perform the following manipulations:

- divide it into two halves
*s*_{1}..*s*_{n}and*s*_{n + 1}..*s*_{2n} - reverse each of them
*s*_{n}..*s*_{1}and*s*_{2n}..*s*_{n + 1} - concatenate the resulting strings into
*s*_{n}..*s*_{1}*s*_{2n}..*s*_{n + 1}

Output the result of these manipulations.

Input

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

Output the string which is the result of the described manipulations.

Examples

Input

codeforces

Output

fedocsecro

Input

qwertyasdfgh

Output

ytrewqhgfdsa

Codeforces (c) Copyright 2010-2017 Mike Mirzayanov

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