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.Arrays;
import java.util.Scanner;

/**
 * Created by Admin on 11.05.2016.
 */
public class Main {

    static boolean ans(int n ){

        int V[] = new int[10];
        boolean status = false;

        V[n/1000]++; V[(n/100)%10]++; V[(n/10)%10]++;V[n%10]++;

OUT:    for (int i = 0; i < 10; i++){
            if (V[i] >= 2) {
                status = false;
                break OUT;
            }
            else {
                status = true;
            }
        }
        return status;
    }

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        int n = in.nextInt();

        n++;
        while (!ans(n)){

            n++;

        }
        System.out.print(n);
    }
}
