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;

/**
 *
 * @author Taha Kassar
 */
public class ACM {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int input = scan.nextInt();
        int in = input;
        int[] ar = new int[4];
        for (int i = 0; i < 1000; i++) {
            input++;
            in = input;
            for (int j = 0; j < 4; j++) {
                ar[j] = in % 10;
                in = in / 10;
            }
            if (ar[0] == ar[1] || ar[0] == ar[2] || ar[0] == ar[3] || ar[1] == ar[2] || ar[1] == ar[3]
                    || ar[2] == ar[3]) {
            } else {
                System.out.println(input);
                return;
            }   
        }
    }
}