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.*;
import java.util.*;
import java.util.stream.IntStream;

public class stpar
{
    private static BufferedReader f;
    
    public static void main(String[] args) throws IOException {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i=n+1;1==1;i++){
            if(distinctyear(i)){
                System.out.println(i);
                return;
            }
        }
    }

    private static boolean distinctyear(int i) {
        String s = String.valueOf(i);
        ArrayList<Integer> list = new ArrayList();
        for(int j=0;j<s.length();j++){
            list.add(Integer.parseInt(s.substring(j,j+1)));
        }
        Collections.sort(list);
        for(int j=0;j<list.size()-1;j++){
            if(Objects.equals(list.get(j), list.get(j+1))) return false;
        }
        return true;
    }
}