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.PrintWriter;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by Roland on 10/7/2015.
 */
public class NextRound {

    private Scanner scanner = new Scanner(System.in);
    private PrintWriter writer = new PrintWriter(System.out);
    private static int[] list;

    public int count(){

        int a = scanner.nextInt();

        for (int i = a+1; i <= 12345; i++) {
            if(allDigitsDif(i)){
                return i;
            }
        }

        return  -1;
    }


    public boolean allDigitsDif(int numb){

        char[] number = Integer.toString(numb).toCharArray();

        for (int i = 0; i < number.length; i++) {
            for (int j = i+1; j < number.length; j++) {
                if(number[i] == number[j]){
                    return false;
                }
            }
        }
        return true;
    }



    public static void main(String[] args){

        NextRound ob = new NextRound();
        System.out.println(ob.count());


    }
}
