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 in = new Scanner(System.in);
        
        int x = in.nextInt()+1;
        int u = x;
        Integer []a = new Integer [4];
        a=year(u);
        
        Set<Integer>set = new HashSet<>(Arrays.asList(a));
        
            while(set.size()!=4){
            u++;
        a=year(u);
        set = new HashSet<>(Arrays.asList(a));
        
        }
        
        if(set.size()==4){
         for (int i = 3; i >= 0; i--) {
            System.out.print(a[i]);
            
        }
        System.out.println("");
        }
        
       
        
    }
    
    public static Integer[] year(int y){
        Integer []b = new Integer[4];
        for (int i = 0; i < 4; i++) {
            b[i]=y%10;
            y/=10;
        }
          
    return b;
    }

}
