It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
import java.util.Scanner;

// created by LWJGLRobot
public class Main {

	public static Scanner scr = new Scanner(System.in);

	public static void main(String[] args) throws Exception {
		int y = scr.nextInt();
		for (int i = y + 1;; i++) {
			if (raz(i + "")) {
				System.out.println(i);
				System.exit(0);
			}
		}
	}

	public static boolean raz(String num) {
		for (int i = 0; i < num.length(); i++) {
			for (int q = i + 1; q < num.length(); q++) {
				if (num.charAt(i) == num.charAt(q)) {
					return false;
				}
			}
		}
		return true;
	}
}