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.*;

public class Main {

    public static boolean isDis(int x) {
        boolean dis = true;
        String s = String.valueOf(x);
        for (int i = 0; i <= s.length()-1 ; i++){
            for (int j=i+1; j <s.length(); j++)
                if (s.charAt(i)==s.charAt(j))
                    dis = false;
            if (!dis)
            break;
    }
        return dis;
    }
    public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        while (!isDis(n+1)){
                n++;
            }
        System.out.println(n+1);

    }
}