Let us call a number a lucky number if all the digits in the number are odd.

Given a number $N$ , Alice wonders what is the nearest lucky number to $N$.

Find a number $X$ such that $abs(N-X)$ is minimum and $X$ is a lucky number.

Input Format:

First line contains an integer $N$

Output Format:

Print an integer $X$ such that $abs(N-X)$ is minimum
Incase of multiple answers, print the smallest answer

Constraints:
$1 \leq N \leq 10^{18}$