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 Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        while(checkUnique(n+1)!=true){
            n = n + 1;
        }
        System.out.println(n+1);
    }

    public static boolean checkUnique(int n){
        String str = n + "";
        char ch[] = str.toCharArray();
        Arrays.sort(ch);
        for(int i=0; i<ch.length-1; i++){
            if(ch[i] == ch[i+1]){
                return false;
            }
        }
        return true;
    }
}