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.*;

/**
 * Main
 */
public class Main {

    public static boolean done = false;

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int year = in.nextInt();

        for (long i = year + 1; i <= (long) (1e9) * 3; i++) {
            if (hasUniqueDigits(i)) {
                System.out.println(i);
                break;
            }
        }
    }

    public static boolean hasUniqueDigits(long year) {
        boolean[] used = new boolean[10];

        while (year > 0) {
            int remainder = (int) year % 10;
            if (used[remainder]) {
                return false;
            } else {
                used[remainder] = true;
            }
            year /= 10;
        }

        return true;
    }

}