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 BeautifulYear {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) {
            int x = in.nextInt();
            boolean found = false;
            while (!found) {
                x++;
                String S = Integer.toString(x);
                boolean eq = true;
                for (int i = 0; i < S.length(); i++) {
                    for (int j = i + 1; j < S.length(); j++) {
                        if (S.charAt(j) == S.charAt(i))
                            eq = false;
                    }
                }
                if (eq)
                    found = true;
            }
            System.out.println(x);
        }
    }

}
