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 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int t=in.nextInt();
        boolean flag;
        do
        {
            t++;
            flag=is(t+"");
            if(flag)
            {
               System.out.println(t); 
               break;
            }
        }
        while(true);
        
       
    }
    public static boolean is(String a)
    {
        HashSet<Character> all = new HashSet<Character>();
        for(int i=0;i<a.length();i++)
        {
            all.add(a.charAt(i));
        }
        if(a.length()==all.size())
            return true;
        return false;
    }
            
}
