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 number = in.nextInt();
        number++;
        Set<Integer> set = new HashSet<>();
        while(number < 9020) {
            set.add(number % 10);
            set.add((number % 100) / 10);
            set.add((number % 1000) / 100);
            set.add(number / 1000);
            if(set.size() == 4) {
                System.out.println(number);
                break;
            }
            set.clear();
            number++;
        }

    }
}

