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.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class main {
    public static boolean isDistinct(int y) {
        String s = String.valueOf(y);
        boolean[] seen = new boolean[128];
        for (int i = 0; i < 4; i++) {
            if (seen[s.charAt(i)])
                return false;
            else {
                seen[s.charAt(i)] = true;
            }
        }
        return true;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int dist = 0;
        int i = n + 1;
        while (true) {
            if (isDistinct(i)) {
                dist = i;
                break;
            }
            i++;
        }
        System.out.print(dist);
    }
}
