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;

public class Main {

    public static void main(String[] args) {
        //1:  Declare/Define variables
        Scanner in = new Scanner(System.in);
        HashSet yearUniqueness = new HashSet();
        String yearString;
        short year = in.nextShort();

        //2: Generate the next unique year
        while (yearUniqueness.size() != 4) {
            yearUniqueness.clear();
            yearString = "" + (++year);

            for (int i = 0; i < 4; i++) {
                yearUniqueness.add(yearString.charAt(i));
            }

        }
        
        
        //3: Print the result
        System.out.println(year);
    }
}
