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.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int answer = n;
        Set<Character> as = new HashSet<>();
        while (true) {
            as = new HashSet<>();
            int i = ++n;
            char a1 = (i + "").charAt(0);
            char a2 = (i + "").charAt(1);
            char a3 = (i + "").charAt(2);
            char a4 = (i + "").charAt(3);
            as.add(a1);
            as.add(a2);
            as.add(a3);
            as.add(a4);
            if (as.size() == 4) {
                answer = i;
                break;
            }
        }
        System.out.println(answer);
    }
}
