parimpar

Task

You are given an even length string containing only lowercase English letters. Print the string obtained after swapping the characters on positions $i$ and $i+1$ for all odd $i$.

In other words, we will swap the characters on positions $1$ and $2$, $3$ and $4$, $5$ and $6$ etc.

Input data

The first line of the input contains $S$.

Output data

The first line of the output contains $S$, after the swaps have been made.

Constraints and clarifications

• $1 \leq$ length of $S \leq 100$;

Example 1

stdin

abcdef

stdout

badcfe

Explanation

We first swap a and b, then c and d and then, e and f.

Example 2

stdin

kilonova

stdout

ikolonav