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.ArrayList;
import java.util.Scanner;

/**
 * Created by horacio on 19-05-15.
 */
public class P271A {
    public static void main(String[] args) {
        Scanner l = new Scanner(System.in);
        int a = l.nextInt();
        do {
            a++;
        } while(!esDistinto(a));
        System.out.println(a);
    }

    private static boolean esDistinto(int a) {
        ArrayList<Integer> li=new ArrayList<Integer>();
        while (a>0) {
            int u = a % 10;
            a /= 10;
            if(!li.contains(u))li.add(u);
        }
        return li.size()==4?true:false;
    }
}
