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.Scanner;

public class main {
    public static void main (String [] args){
        Scanner in = new Scanner (System.in);
        int n = in.nextInt() ;
        for (int i=n+1; ; i++){
            if (dist(i)){
                System.out.println(i);
                break;
            }

        }
        
    }

    public static boolean dist (int x){
        int [] a = new int [4] ;
        for (int i=0; i<4; i++){
            a[i] = x% 10 ;
            x = x / 10;
        }

        for (int i=0; i<3; i++)
            for (int j=i+1; j<4; j++)
                if (a[i] == a[j])
                    return false;
        return true;
    }


    
}