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.*;

public class BeautifulYear {
    public static void main(String[] args){
        Scanner kbd = new Scanner(System.in);
        
        int y = kbd.nextInt();
        HashSet h = new HashSet();
        boolean dy = false;
        
        while(dy == false){
            y++;
            String year = String.valueOf(y);
            for(int i = 0; i < year.length(); i++){
                h.add(year.charAt(i));
            }
            if(h.size() == 4){
                System.out.println(y);
                dy = true;
            }
            h.clear();
        }
    }
}
