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.*;
import java.io.*;

public class Main {
	public static final int[] lucky = {4, 7, 44, 47, 74, 77, 444, 447, 474, 477, 744, 747, 774, 777};

	public static void main(String[] args) throws Throwable {
		Scanner s = new Scanner(System.in);
		int y = s.nextInt() + 1;
		int ans = 0;

		for (int x = y; true; ++x) {
			int d0 = (x/1)    % 10;
			int d1 = (x/10)   % 10;
			int d2 = (x/100)  % 10;
			int d3 = (x/1000) % 10;
			if (d0 == d1) continue;
			if (d0 == d2) continue;
			if (d0 == d3) continue;
			if (d1 == d2) continue;
			if (d1 == d3) continue;
			if (d2 == d3) continue;

			ans = x;
			break;
		}

		System.out.println(ans);
	}
}