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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class main {

    public static boolean check(String s) {

        boolean f = false;
        for (int i = 0; i < s.length(); i++) {
            for (int j = 0; j < s.length(); j++) {
                if (j != i) {
                    if (s.charAt(j) == s.charAt(i))
                        f = true;
                }
            }
        }

        return f;

    }

    public static void main(String[] args) throws NumberFormatException,
            IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int yr = Integer.parseInt(br.readLine());
        yr++;
        String yrs = yr + "";
        while (true) {

            if (check(yrs) == true) {
                yr++;
                yrs = yr + "";
            } else
                break;

        }
        System.out.println(yrs);

    }
}
