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.Scanner;


public class Main {

    public static boolean check(String arg) {
        for (int i = 0; i < arg.length()-1; i++)
            if (arg.substring(i+1).contains(arg.charAt(i) + ""))
                return false;

        return true;
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Scanner scanner = new Scanner(System.in);

        int n = scanner.nextInt();

        int i=n+1;
        
        while(true) {
            if (check(Integer.toString(i))) {
                System.out.println(i);
                break;
            }
            i++;
        }

        scanner.close();
    }
}