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.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {

	

	public Main() throws IOException {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter out = new PrintWriter(new BufferedOutputStream(System.out));
		
		boolean ok = false;
		int y = Integer.parseInt(in.readLine());

		while (!ok) {
			y++;

			int a = y % 10;

			int b = (y /10) %10;

			int c = (y / 100) %10;

			int d = (y / 1000) %10;
			
			ok = a != b && a != c && a !=d && b !=c && b != d && c != d;

			//System.out.printf("%d = %d %d %d %d\n", y, d, c, b, a);

		}
		
		out.println(y);
		
		out.flush();
		out.close();
	}

	

	public static void main(String args[]) throws IOException {
		new Main();
	}
}